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Finding the Fourth Proportional to 125,264.20, 172,866 and 71,556.40

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Solution

The fourth proportional to 125,264.20, 172,866 and 71,556.40 is: 98,748.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,264.20 : 172,866 = 71,556.40 : x
  2. Step 2: Convert to fraction form
    125,264.20/172,866 = 71,556.40/x
  3. Step 3: Cross multiply
    125,264.20x = 172,866 × 71,556.40
  4. Step 4: Simplify right side
    125,264.20x = 12,369,668,642.40
  5. Step 5: Solve for x
    x = 12,369,668,642.40/125,264.20
  6. Step 6: Final answer
    x = 98,748.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.