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Finding the Fourth Proportional to 125,405.64, 173,061.90 and 68,822.28

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Solution

The fourth proportional to 125,405.64, 173,061.90 and 68,822.28 is: 94,975.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,405.64 : 173,061.90 = 68,822.28 : x
  2. Step 2: Convert to fraction form
    125,405.64/173,061.90 = 68,822.28/x
  3. Step 3: Cross multiply
    125,405.64x = 173,061.90 × 68,822.28
  4. Step 4: Simplify right side
    125,405.64x = 11,910,514,539.13
  5. Step 5: Solve for x
    x = 11,910,514,539.13/125,405.64
  6. Step 6: Final answer
    x = 94,975.91

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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.