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Finding the Fourth Proportional to 172,400.60, 258,600.90 and 88,128.20

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Solution

The fourth proportional to 172,400.60, 258,600.90 and 88,128.20 is: 132,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,400.60 : 258,600.90 = 88,128.20 : x
  2. Step 2: Convert to fraction form
    172,400.60/258,600.90 = 88,128.20/x
  3. Step 3: Cross multiply
    172,400.60x = 258,600.90 × 88,128.20
  4. Step 4: Simplify right side
    172,400.60x = 22,790,031,835.38
  5. Step 5: Solve for x
    x = 22,790,031,835.38/172,400.60
  6. Step 6: Final answer
    x = 132,192.30

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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.