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Finding the Fourth Proportional to 125,111.20, 187,698.80 and 88,247.20

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Solution

The fourth proportional to 125,111.20, 187,698.80 and 88,247.20 is: 132,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,111.20 : 187,698.80 = 88,247.20 : x
  2. Step 2: Convert to fraction form
    125,111.20/187,698.80 = 88,247.20/x
  3. Step 3: Cross multiply
    125,111.20x = 187,698.80 × 88,247.20
  4. Step 4: Simplify right side
    125,111.20x = 16,563,893,543.36
  5. Step 5: Solve for x
    x = 16,563,893,543.36/125,111.20
  6. Step 6: Final answer
    x = 132,393.37

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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.