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Finding the Fourth Proportional to 90,841.40, 136,002.90 and 88,249.40

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Solution

The fourth proportional to 90,841.40, 136,002.90 and 88,249.40 is: 132,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,841.40 : 136,002.90 = 88,249.40 : x
  2. Step 2: Convert to fraction form
    90,841.40/136,002.90 = 88,249.40/x
  3. Step 3: Cross multiply
    90,841.40x = 136,002.90 × 88,249.40
  4. Step 4: Simplify right side
    90,841.40x = 12,002,174,323.26
  5. Step 5: Solve for x
    x = 12,002,174,323.26/90,841.40
  6. Step 6: Final answer
    x = 132,122.30

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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.