Home / 85,412,141.60-128,118,212.40-84,615,879.20

Finding the Fourth Proportional to 85,412,141.60, 128,118,212.40 and 84,615,879.20

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Solution

The fourth proportional to 85,412,141.60, 128,118,212.40 and 84,615,879.20 is: 126,923,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412,141.60 : 128,118,212.40 = 84,615,879.20 : x
  2. Step 2: Convert to fraction form
    85,412,141.60/128,118,212.40 = 84,615,879.20/x
  3. Step 3: Cross multiply
    85,412,141.60x = 128,118,212.40 × 84,615,879.20
  4. Step 4: Simplify right side
    85,412,141.60x = 10,840,835,183,758,342
  5. Step 5: Solve for x
    x = 10,840,835,183,758,342/85,412,141.60
  6. Step 6: Final answer
    x = 126,923,818.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.