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Finding the Fourth Proportional to 72,611.03, 108,819.64 and 38,807.75

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Solution

The fourth proportional to 72,611.03, 108,819.64 and 38,807.75 is: 58,159.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,611.03 : 108,819.64 = 38,807.75 : x
  2. Step 2: Convert to fraction form
    72,611.03/108,819.64 = 38,807.75/x
  3. Step 3: Cross multiply
    72,611.03x = 108,819.64 × 38,807.75
  4. Step 4: Simplify right side
    72,611.03x = 4,223,045,384.21
  5. Step 5: Solve for x
    x = 4,223,045,384.21/72,611.03
  6. Step 6: Final answer
    x = 58,159.83

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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.