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Finding the Fourth Proportional to 90,370.61, 134,747.97 and 87,887.75

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Solution

The fourth proportional to 90,370.61, 134,747.97 and 87,887.75 is: 131,045.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,370.61 : 134,747.97 = 87,887.75 : x
  2. Step 2: Convert to fraction form
    90,370.61/134,747.97 = 87,887.75/x
  3. Step 3: Cross multiply
    90,370.61x = 134,747.97 × 87,887.75
  4. Step 4: Simplify right side
    90,370.61x = 11,842,694,897.05
  5. Step 5: Solve for x
    x = 11,842,694,897.05/90,370.61
  6. Step 6: Final answer
    x = 131,045.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.