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Finding the Fourth Proportional to 67,787.77, 101,681.14 and 20,402.66

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Solution

The fourth proportional to 67,787.77, 101,681.14 and 20,402.66 is: 30,603.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,787.77 : 101,681.14 = 20,402.66 : x
  2. Step 2: Convert to fraction form
    67,787.77/101,681.14 = 20,402.66/x
  3. Step 3: Cross multiply
    67,787.77x = 101,681.14 × 20,402.66
  4. Step 4: Simplify right side
    67,787.77x = 2,074,565,727.83
  5. Step 5: Solve for x
    x = 2,074,565,727.83/67,787.77
  6. Step 6: Final answer
    x = 30,603.83

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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.