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Finding the Fourth Proportional to 172,156.80, 257,756.16 and 87,734.92

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Solution

The fourth proportional to 172,156.80, 257,756.16 and 87,734.92 is: 131,358.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,156.80 : 257,756.16 = 87,734.92 : x
  2. Step 2: Convert to fraction form
    172,156.80/257,756.16 = 87,734.92/x
  3. Step 3: Cross multiply
    172,156.80x = 257,756.16 × 87,734.92
  4. Step 4: Simplify right side
    172,156.80x = 22,614,216,077.11
  5. Step 5: Solve for x
    x = 22,614,216,077.11/172,156.80
  6. Step 6: Final answer
    x = 131,358.25

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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.