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Finding the Fourth Proportional to 124,784.88, 187,264.80 and 72,121.92

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Solution

The fourth proportional to 124,784.88, 187,264.80 and 72,121.92 is: 108,233.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,784.88 : 187,264.80 = 72,121.92 : x
  2. Step 2: Convert to fraction form
    124,784.88/187,264.80 = 72,121.92/x
  3. Step 3: Cross multiply
    124,784.88x = 187,264.80 × 72,121.92
  4. Step 4: Simplify right side
    124,784.88x = 13,505,896,924.42
  5. Step 5: Solve for x
    x = 13,505,896,924.42/124,784.88
  6. Step 6: Final answer
    x = 108,233.44

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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.