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Finding the Fourth Proportional to 90,805.28, 136,321.32 and 61,353.68

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Solution

The fourth proportional to 90,805.28, 136,321.32 and 61,353.68 is: 92,107.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,805.28 : 136,321.32 = 61,353.68 : x
  2. Step 2: Convert to fraction form
    90,805.28/136,321.32 = 61,353.68/x
  3. Step 3: Cross multiply
    90,805.28x = 136,321.32 × 61,353.68
  4. Step 4: Simplify right side
    90,805.28x = 8,363,814,644.46
  5. Step 5: Solve for x
    x = 8,363,814,644.46/90,805.28
  6. Step 6: Final answer
    x = 92,107.14

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1.5x scale

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.