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Finding the Fourth Proportional to 125,103.52, 172,642.80 and 68,514.40

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Solution

The fourth proportional to 125,103.52, 172,642.80 and 68,514.40 is: 94,549.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,103.52 : 172,642.80 = 68,514.40 : x
  2. Step 2: Convert to fraction form
    125,103.52/172,642.80 = 68,514.40/x
  3. Step 3: Cross multiply
    125,103.52x = 172,642.80 × 68,514.40
  4. Step 4: Simplify right side
    125,103.52x = 11,828,517,856.32
  5. Step 5: Solve for x
    x = 11,828,517,856.32/125,103.52
  6. Step 6: Final answer
    x = 94,549.84

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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.