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Finding the Fourth Proportional to 43,332, 64,989.78 and 21,123.04

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Solution

The fourth proportional to 43,332, 64,989.78 and 21,123.04 is: 31,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,332 : 64,989.78 = 21,123.04 : x
  2. Step 2: Convert to fraction form
    43,332/64,989.78 = 21,123.04/x
  3. Step 3: Cross multiply
    43,332x = 64,989.78 × 21,123.04
  4. Step 4: Simplify right side
    43,332x = 1,372,781,722.53
  5. Step 5: Solve for x
    x = 1,372,781,722.53/43,332
  6. Step 6: Final answer
    x = 31,680.55

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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.