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Finding the Fourth Proportional to 56,785.92, 85,178.88 and 19,841.28

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Solution

The fourth proportional to 56,785.92, 85,178.88 and 19,841.28 is: 29,761.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,785.92 : 85,178.88 = 19,841.28 : x
  2. Step 2: Convert to fraction form
    56,785.92/85,178.88 = 19,841.28/x
  3. Step 3: Cross multiply
    56,785.92x = 85,178.88 × 19,841.28
  4. Step 4: Simplify right side
    56,785.92x = 1,690,058,008.17
  5. Step 5: Solve for x
    x = 1,690,058,008.17/56,785.92
  6. Step 6: Final answer
    x = 29,761.92

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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.