Home / 90,711.20-136,034.40-31,548.80

Finding the Fourth Proportional to 90,711.20, 136,034.40 and 31,548.80

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Solution

The fourth proportional to 90,711.20, 136,034.40 and 31,548.80 is: 47,311.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,711.20 : 136,034.40 = 31,548.80 : x
  2. Step 2: Convert to fraction form
    90,711.20/136,034.40 = 31,548.80/x
  3. Step 3: Cross multiply
    90,711.20x = 136,034.40 × 31,548.80
  4. Step 4: Simplify right side
    90,711.20x = 4,291,722,078.72
  5. Step 5: Solve for x
    x = 4,291,722,078.72/90,711.20
  6. Step 6: Final answer
    x = 47,311.93

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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.