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Finding the Fourth Proportional to 71,814.40, 107,737.12 and 21,893.20

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Solution

The fourth proportional to 71,814.40, 107,737.12 and 21,893.20 is: 32,844.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,814.40 : 107,737.12 = 21,893.20 : x
  2. Step 2: Convert to fraction form
    71,814.40/107,737.12 = 21,893.20/x
  3. Step 3: Cross multiply
    71,814.40x = 107,737.12 × 21,893.20
  4. Step 4: Simplify right side
    71,814.40x = 2,358,710,315.58
  5. Step 5: Solve for x
    x = 2,358,710,315.58/71,814.40
  6. Step 6: Final answer
    x = 32,844.53

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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.