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Finding the Fourth Proportional to 72,612,101.70, 108,918,152.55 and 38,515,896.90

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Solution

The fourth proportional to 72,612,101.70, 108,918,152.55 and 38,515,896.90 is: 57,773,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612,101.70 : 108,918,152.55 = 38,515,896.90 : x
  2. Step 2: Convert to fraction form
    72,612,101.70/108,918,152.55 = 38,515,896.90/x
  3. Step 3: Cross multiply
    72,612,101.70x = 108,918,152.55 × 38,515,896.90
  4. Step 4: Simplify right side
    72,612,101.70x = 4,195,080,334,154,272
  5. Step 5: Solve for x
    x = 4,195,080,334,154,272/72,612,101.70
  6. Step 6: Final answer
    x = 57,773,845.35

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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.