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Finding the Fourth Proportional to 91,265.60, 136,921.08 and 53,856.56

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Solution

The fourth proportional to 91,265.60, 136,921.08 and 53,856.56 is: 80,798.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,265.60 : 136,921.08 = 53,856.56 : x
  2. Step 2: Convert to fraction form
    91,265.60/136,921.08 = 53,856.56/x
  3. Step 3: Cross multiply
    91,265.60x = 136,921.08 × 53,856.56
  4. Step 4: Simplify right side
    91,265.60x = 7,374,098,360.28
  5. Step 5: Solve for x
    x = 7,374,098,360.28/91,265.60
  6. Step 6: Final answer
    x = 80,798.22

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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.