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Finding the Fourth Proportional to 124,752.40, 187,128.60 and 72,134.80

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Solution

The fourth proportional to 124,752.40, 187,128.60 and 72,134.80 is: 108,202.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,752.40 : 187,128.60 = 72,134.80 : x
  2. Step 2: Convert to fraction form
    124,752.40/187,128.60 = 72,134.80/x
  3. Step 3: Cross multiply
    124,752.40x = 187,128.60 × 72,134.80
  4. Step 4: Simplify right side
    124,752.40x = 13,498,484,135.28
  5. Step 5: Solve for x
    x = 13,498,484,135.28/124,752.40
  6. Step 6: Final answer
    x = 108,202.20

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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.