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Finding the Fourth Proportional to 115,704.61, 159,755.12 and 90,239.42

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Solution

The fourth proportional to 115,704.61, 159,755.12 and 90,239.42 is: 124,594.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,704.61 : 159,755.12 = 90,239.42 : x
  2. Step 2: Convert to fraction form
    115,704.61/159,755.12 = 90,239.42/x
  3. Step 3: Cross multiply
    115,704.61x = 159,755.12 × 90,239.42
  4. Step 4: Simplify right side
    115,704.61x = 14,416,209,370.83
  5. Step 5: Solve for x
    x = 14,416,209,370.83/115,704.61
  6. Step 6: Final answer
    x = 124,594.94

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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.