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Finding the Fourth Proportional to 71,160.93, 106,756.65 and 21,244.95

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Solution

The fourth proportional to 71,160.93, 106,756.65 and 21,244.95 is: 31,871.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,160.93 : 106,756.65 = 21,244.95 : x
  2. Step 2: Convert to fraction form
    71,160.93/106,756.65 = 21,244.95/x
  3. Step 3: Cross multiply
    71,160.93x = 106,756.65 × 21,244.95
  4. Step 4: Simplify right side
    71,160.93x = 2,268,039,691.42
  5. Step 5: Solve for x
    x = 2,268,039,691.42/71,160.93
  6. Step 6: Final answer
    x = 31,871.98

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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.