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Finding the Fourth Proportional to 125,299.20, 188,002.80 and 72,753.60

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Solution

The fourth proportional to 125,299.20, 188,002.80 and 72,753.60 is: 109,161.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,299.20 : 188,002.80 = 72,753.60 : x
  2. Step 2: Convert to fraction form
    125,299.20/188,002.80 = 72,753.60/x
  3. Step 3: Cross multiply
    125,299.20x = 188,002.80 × 72,753.60
  4. Step 4: Simplify right side
    125,299.20x = 13,677,880,510.08
  5. Step 5: Solve for x
    x = 13,677,880,510.08/125,299.20
  6. Step 6: Final answer
    x = 109,161.75

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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.