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Finding the Fourth Proportional to 90,750.40, 135,931.20 and 73,254.40

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Solution

The fourth proportional to 90,750.40, 135,931.20 and 73,254.40 is: 109,724.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,750.40 : 135,931.20 = 73,254.40 : x
  2. Step 2: Convert to fraction form
    90,750.40/135,931.20 = 73,254.40/x
  3. Step 3: Cross multiply
    90,750.40x = 135,931.20 × 73,254.40
  4. Step 4: Simplify right side
    90,750.40x = 9,957,558,497.28
  5. Step 5: Solve for x
    x = 9,957,558,497.28/90,750.40
  6. Step 6: Final answer
    x = 109,724.68

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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.