Home / 85,000,209.20-127,531,806.60-81,850,929.20

Finding the Fourth Proportional to 85,000,209.20, 127,531,806.60 and 81,850,929.20

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Solution

The fourth proportional to 85,000,209.20, 127,531,806.60 and 81,850,929.20 is: 122,806,719.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,000,209.20 : 127,531,806.60 = 81,850,929.20 : x
  2. Step 2: Convert to fraction form
    85,000,209.20/127,531,806.60 = 81,850,929.20/x
  3. Step 3: Cross multiply
    85,000,209.20x = 127,531,806.60 × 81,850,929.20
  4. Step 4: Simplify right side
    85,000,209.20x = 10,438,596,872,764,692
  5. Step 5: Solve for x
    x = 10,438,596,872,764,692/85,000,209.20
  6. Step 6: Final answer
    x = 122,806,719.78

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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.