Home / 90,772.20-136,125.90-31,609.80

Finding the Fourth Proportional to 90,772.20, 136,125.90 and 31,609.80

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Solution

The fourth proportional to 90,772.20, 136,125.90 and 31,609.80 is: 47,403.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,772.20 : 136,125.90 = 31,609.80 : x
  2. Step 2: Convert to fraction form
    90,772.20/136,125.90 = 31,609.80/x
  3. Step 3: Cross multiply
    90,772.20x = 136,125.90 × 31,609.80
  4. Step 4: Simplify right side
    90,772.20x = 4,302,912,473.82
  5. Step 5: Solve for x
    x = 4,302,912,473.82/90,772.20
  6. Step 6: Final answer
    x = 47,403.42

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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.