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Finding the Fourth Proportional to 172,557.77, 258,618.56 and 77,686.92

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Solution

The fourth proportional to 172,557.77, 258,618.56 and 77,686.92 is: 116,432.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,557.77 : 258,618.56 = 77,686.92 : x
  2. Step 2: Convert to fraction form
    172,557.77/258,618.56 = 77,686.92/x
  3. Step 3: Cross multiply
    172,557.77x = 258,618.56 × 77,686.92
  4. Step 4: Simplify right side
    172,557.77x = 20,091,279,833.56
  5. Step 5: Solve for x
    x = 20,091,279,833.56/172,557.77
  6. Step 6: Final answer
    x = 116,432.20

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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.