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Finding the Fourth Proportional to 101,785.16, 140,452.18 and 56,451.78

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Solution

The fourth proportional to 101,785.16, 140,452.18 and 56,451.78 is: 77,897.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,785.16 : 140,452.18 = 56,451.78 : x
  2. Step 2: Convert to fraction form
    101,785.16/140,452.18 = 56,451.78/x
  3. Step 3: Cross multiply
    101,785.16x = 140,452.18 × 56,451.78
  4. Step 4: Simplify right side
    101,785.16x = 7,928,775,565.88
  5. Step 5: Solve for x
    x = 7,928,775,565.88/101,785.16
  6. Step 6: Final answer
    x = 77,897.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.