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Finding the Fourth Proportional to 71,045.53, 106,585.83 and 21,125.41

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Solution

The fourth proportional to 71,045.53, 106,585.83 and 21,125.41 is: 31,693.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,045.53 : 106,585.83 = 21,125.41 : x
  2. Step 2: Convert to fraction form
    71,045.53/106,585.83 = 21,125.41/x
  3. Step 3: Cross multiply
    71,045.53x = 106,585.83 × 21,125.41
  4. Step 4: Simplify right side
    71,045.53x = 2,251,669,358.94
  5. Step 5: Solve for x
    x = 2,251,669,358.94/71,045.53
  6. Step 6: Final answer
    x = 31,693.33

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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.