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Finding the Fourth Proportional to 72,519.84, 108,812.40 and 39,200.90

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Solution

The fourth proportional to 72,519.84, 108,812.40 and 39,200.90 is: 58,818.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,519.84 : 108,812.40 = 39,200.90 : x
  2. Step 2: Convert to fraction form
    72,519.84/108,812.40 = 39,200.90/x
  3. Step 3: Cross multiply
    72,519.84x = 108,812.40 × 39,200.90
  4. Step 4: Simplify right side
    72,519.84x = 4,265,544,011.16
  5. Step 5: Solve for x
    x = 4,265,544,011.16/72,519.84
  6. Step 6: Final answer
    x = 58,818.99

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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.