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Finding the Fourth Proportional to 125,116.74, 172,673.52 and 71,409.90

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Solution

The fourth proportional to 125,116.74, 172,673.52 and 71,409.90 is: 98,552.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,116.74 : 172,673.52 = 71,409.90 : x
  2. Step 2: Convert to fraction form
    125,116.74/172,673.52 = 71,409.90/x
  3. Step 3: Cross multiply
    125,116.74x = 172,673.52 × 71,409.90
  4. Step 4: Simplify right side
    125,116.74x = 12,330,598,795.85
  5. Step 5: Solve for x
    x = 12,330,598,795.85/125,116.74
  6. Step 6: Final answer
    x = 98,552.75

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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.