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Finding the Fourth Proportional to 125,215.70, 172,798.20 and 67,855.14

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Solution

The fourth proportional to 125,215.70, 172,798.20 and 67,855.14 is: 93,640.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,215.70 : 172,798.20 = 67,855.14 : x
  2. Step 2: Convert to fraction form
    125,215.70/172,798.20 = 67,855.14/x
  3. Step 3: Cross multiply
    125,215.70x = 172,798.20 × 67,855.14
  4. Step 4: Simplify right side
    125,215.70x = 11,725,246,052.75
  5. Step 5: Solve for x
    x = 11,725,246,052.75/125,215.70
  6. Step 6: Final answer
    x = 93,640.38

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1.5x scale

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.