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Finding the Fourth Proportional to 125,129.40, 172,680.78 and 68,537.10

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Solution

The fourth proportional to 125,129.40, 172,680.78 and 68,537.10 is: 94,582.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,129.40 : 172,680.78 = 68,537.10 : x
  2. Step 2: Convert to fraction form
    125,129.40/172,680.78 = 68,537.10/x
  3. Step 3: Cross multiply
    125,129.40x = 172,680.78 × 68,537.10
  4. Step 4: Simplify right side
    125,129.40x = 11,835,039,886.94
  5. Step 5: Solve for x
    x = 11,835,039,886.94/125,129.40
  6. Step 6: Final answer
    x = 94,582.41

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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.