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Finding the Fourth Proportional to 90,117.80, 134,958.76 and 87,755.84

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Solution

The fourth proportional to 90,117.80, 134,958.76 and 87,755.84 is: 131,421.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,117.80 : 134,958.76 = 87,755.84 : x
  2. Step 2: Convert to fraction form
    90,117.80/134,958.76 = 87,755.84/x
  3. Step 3: Cross multiply
    90,117.80x = 134,958.76 × 87,755.84
  4. Step 4: Simplify right side
    90,117.80x = 11,843,419,349.16
  5. Step 5: Solve for x
    x = 11,843,419,349.16/90,117.80
  6. Step 6: Final answer
    x = 131,421.53

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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.