Home / 85,412,143.60-128,118,215.40-84,615,881.20

Finding the Fourth Proportional to 85,412,143.60, 128,118,215.40 and 84,615,881.20

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Solution

The fourth proportional to 85,412,143.60, 128,118,215.40 and 84,615,881.20 is: 126,923,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412,143.60 : 128,118,215.40 = 84,615,881.20 : x
  2. Step 2: Convert to fraction form
    85,412,143.60/128,118,215.40 = 84,615,881.20/x
  3. Step 3: Cross multiply
    85,412,143.60x = 128,118,215.40 × 84,615,881.20
  4. Step 4: Simplify right side
    85,412,143.60x = 10,840,835,693,842,412
  5. Step 5: Solve for x
    x = 10,840,835,693,842,412/85,412,143.60
  6. Step 6: Final answer
    x = 126,923,821.80

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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.