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Finding the Fourth Proportional to 172,565.70, 258,552.90 and 137,136.30

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Solution

The fourth proportional to 172,565.70, 258,552.90 and 137,136.30 is: 205,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,565.70 : 258,552.90 = 137,136.30 : x
  2. Step 2: Convert to fraction form
    172,565.70/258,552.90 = 137,136.30/x
  3. Step 3: Cross multiply
    172,565.70x = 258,552.90 × 137,136.30
  4. Step 4: Simplify right side
    172,565.70x = 35,456,988,060.27
  5. Step 5: Solve for x
    x = 35,456,988,060.27/172,565.70
  6. Step 6: Final answer
    x = 205,469.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.