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Finding the Fourth Proportional to 125,521.30, 188,222.55 and 72,946.90

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Solution

The fourth proportional to 125,521.30, 188,222.55 and 72,946.90 is: 109,385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,521.30 : 188,222.55 = 72,946.90 : x
  2. Step 2: Convert to fraction form
    125,521.30/188,222.55 = 72,946.90/x
  3. Step 3: Cross multiply
    125,521.30x = 188,222.55 × 72,946.90
  4. Step 4: Simplify right side
    125,521.30x = 13,730,251,532.60
  5. Step 5: Solve for x
    x = 13,730,251,532.60/125,521.30
  6. Step 6: Final answer
    x = 109,385.83

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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.