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Finding the Fourth Proportional to 101,729.53, 140,385.30 and 56,407.60

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Solution

The fourth proportional to 101,729.53, 140,385.30 and 56,407.60 is: 77,841.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,729.53 : 140,385.30 = 56,407.60 : x
  2. Step 2: Convert to fraction form
    101,729.53/140,385.30 = 56,407.60/x
  3. Step 3: Cross multiply
    101,729.53x = 140,385.30 × 56,407.60
  4. Step 4: Simplify right side
    101,729.53x = 7,918,797,848.28
  5. Step 5: Solve for x
    x = 7,918,797,848.28/101,729.53
  6. Step 6: Final answer
    x = 77,841.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.