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Finding the Fourth Proportional to 74,251.40, 111,366.30 and 21,655.40

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Solution

The fourth proportional to 74,251.40, 111,366.30 and 21,655.40 is: 32,479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,251.40 : 111,366.30 = 21,655.40 : x
  2. Step 2: Convert to fraction form
    74,251.40/111,366.30 = 21,655.40/x
  3. Step 3: Cross multiply
    74,251.40x = 111,366.30 × 21,655.40
  4. Step 4: Simplify right side
    74,251.40x = 2,411,681,773.02
  5. Step 5: Solve for x
    x = 2,411,681,773.02/74,251.40
  6. Step 6: Final answer
    x = 32,479.95

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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.