Home / 85,800,445.20-128,952,610.20-74,714,979.60

Finding the Fourth Proportional to 85,800,445.20, 128,952,610.20 and 74,714,979.60

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Solution

The fourth proportional to 85,800,445.20, 128,952,610.20 and 74,714,979.60 is: 112,291,860.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800,445.20 : 128,952,610.20 = 74,714,979.60 : x
  2. Step 2: Convert to fraction form
    85,800,445.20/128,952,610.20 = 74,714,979.60/x
  3. Step 3: Cross multiply
    85,800,445.20x = 128,952,610.20 × 74,714,979.60
  4. Step 4: Simplify right side
    85,800,445.20x = 9,634,691,640,459,752
  5. Step 5: Solve for x
    x = 9,634,691,640,459,752/85,800,445.20
  6. Step 6: Final answer
    x = 112,291,860.70

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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.