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Finding the Fourth Proportional to 71,656.85, 107,485.54 and 21,737.39

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Solution

The fourth proportional to 71,656.85, 107,485.54 and 21,737.39 is: 32,606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,656.85 : 107,485.54 = 21,737.39 : x
  2. Step 2: Convert to fraction form
    71,656.85/107,485.54 = 21,737.39/x
  3. Step 3: Cross multiply
    71,656.85x = 107,485.54 × 21,737.39
  4. Step 4: Simplify right side
    71,656.85x = 2,336,454,510.57
  5. Step 5: Solve for x
    x = 2,336,454,510.57/71,656.85
  6. Step 6: Final answer
    x = 32,606.16

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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.