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Finding the Fourth Proportional to 90,920.99, 125,348.65 and 63,660.40

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Solution

The fourth proportional to 90,920.99, 125,348.65 and 63,660.40 is: 87,765.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,920.99 : 125,348.65 = 63,660.40 : x
  2. Step 2: Convert to fraction form
    90,920.99/125,348.65 = 63,660.40/x
  3. Step 3: Cross multiply
    90,920.99x = 125,348.65 × 63,660.40
  4. Step 4: Simplify right side
    90,920.99x = 7,979,745,431.02
  5. Step 5: Solve for x
    x = 7,979,745,431.02/90,920.99
  6. Step 6: Final answer
    x = 87,765.72

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1.5x scale

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.