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Finding the Fourth Proportional to 101,737.89, 140,397.60 and 56,415.90

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Solution

The fourth proportional to 101,737.89, 140,397.60 and 56,415.90 is: 77,853.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,737.89 : 140,397.60 = 56,415.90 : x
  2. Step 2: Convert to fraction form
    101,737.89/140,397.60 = 56,415.90/x
  3. Step 3: Cross multiply
    101,737.89x = 140,397.60 × 56,415.90
  4. Step 4: Simplify right side
    101,737.89x = 7,920,656,961.84
  5. Step 5: Solve for x
    x = 7,920,656,961.84/101,737.89
  6. Step 6: Final answer
    x = 77,853.56

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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.