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Finding the Fourth Proportional to 92,417.76, 138,619.80 and 25,856.42

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Solution

The fourth proportional to 92,417.76, 138,619.80 and 25,856.42 is: 38,782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,417.76 : 138,619.80 = 25,856.42 : x
  2. Step 2: Convert to fraction form
    92,417.76/138,619.80 = 25,856.42/x
  3. Step 3: Cross multiply
    92,417.76x = 138,619.80 × 25,856.42
  4. Step 4: Simplify right side
    92,417.76x = 3,584,211,769.12
  5. Step 5: Solve for x
    x = 3,584,211,769.12/92,417.76
  6. Step 6: Final answer
    x = 38,782.72

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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.