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Finding the Fourth Proportional to 125,079.84, 172,608.45 and 68,491.20

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Solution

The fourth proportional to 125,079.84, 172,608.45 and 68,491.20 is: 94,516.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,079.84 : 172,608.45 = 68,491.20 : x
  2. Step 2: Convert to fraction form
    125,079.84/172,608.45 = 68,491.20/x
  3. Step 3: Cross multiply
    125,079.84x = 172,608.45 × 68,491.20
  4. Step 4: Simplify right side
    125,079.84x = 11,822,159,870.64
  5. Step 5: Solve for x
    x = 11,822,159,870.64/125,079.84
  6. Step 6: Final answer
    x = 94,516.91

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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.