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Finding the Fourth Proportional to 92,139.57, 127,102.91 and 61,565.31

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Solution

The fourth proportional to 92,139.57, 127,102.91 and 61,565.31 is: 84,926.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,139.57 : 127,102.91 = 61,565.31 : x
  2. Step 2: Convert to fraction form
    92,139.57/127,102.91 = 61,565.31/x
  3. Step 3: Cross multiply
    92,139.57x = 127,102.91 × 61,565.31
  4. Step 4: Simplify right side
    92,139.57x = 7,825,129,748.23
  5. Step 5: Solve for x
    x = 7,825,129,748.23/92,139.57
  6. Step 6: Final answer
    x = 84,926.92

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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.