Home / 85,416,009.60-128,124,014.40-84,619,747.20

Finding the Fourth Proportional to 85,416,009.60, 128,124,014.40 and 84,619,747.20

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Solution

The fourth proportional to 85,416,009.60, 128,124,014.40 and 84,619,747.20 is: 126,929,620.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,416,009.60 : 128,124,014.40 = 84,619,747.20 : x
  2. Step 2: Convert to fraction form
    85,416,009.60/128,124,014.40 = 84,619,747.20/x
  3. Step 3: Cross multiply
    85,416,009.60x = 128,124,014.40 × 84,619,747.20
  4. Step 4: Simplify right side
    85,416,009.60x = 10,841,821,708,777,160
  5. Step 5: Solve for x
    x = 10,841,821,708,777,160/85,416,009.60
  6. Step 6: Final answer
    x = 126,929,620.80

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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.