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Finding the Fourth Proportional to 125,509.57, 187,793.80 and 74,722.84

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Solution

The fourth proportional to 125,509.57, 187,793.80 and 74,722.84 is: 111,804.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,509.57 : 187,793.80 = 74,722.84 : x
  2. Step 2: Convert to fraction form
    125,509.57/187,793.80 = 74,722.84/x
  3. Step 3: Cross multiply
    125,509.57x = 187,793.80 × 74,722.84
  4. Step 4: Simplify right side
    125,509.57x = 14,032,486,070.39
  5. Step 5: Solve for x
    x = 14,032,486,070.39/125,509.57
  6. Step 6: Final answer
    x = 111,804.11

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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.