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Finding the Fourth Proportional to 124,976.80, 187,465.20 and 72,521.20

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Solution

The fourth proportional to 124,976.80, 187,465.20 and 72,521.20 is: 108,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,976.80 : 187,465.20 = 72,521.20 : x
  2. Step 2: Convert to fraction form
    124,976.80/187,465.20 = 72,521.20/x
  3. Step 3: Cross multiply
    124,976.80x = 187,465.20 × 72,521.20
  4. Step 4: Simplify right side
    124,976.80x = 13,595,201,262.24
  5. Step 5: Solve for x
    x = 13,595,201,262.24/124,976.80
  6. Step 6: Final answer
    x = 108,781.80

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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.