Home / 90,961.55-136,456.90-38,378.78

Finding the Fourth Proportional to 90,961.55, 136,456.90 and 38,378.78

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Solution

The fourth proportional to 90,961.55, 136,456.90 and 38,378.78 is: 57,574.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,961.55 : 136,456.90 = 38,378.78 : x
  2. Step 2: Convert to fraction form
    90,961.55/136,456.90 = 38,378.78/x
  3. Step 3: Cross multiply
    90,961.55x = 136,456.90 × 38,378.78
  4. Step 4: Simplify right side
    90,961.55x = 5,237,048,566.35
  5. Step 5: Solve for x
    x = 5,237,048,566.35/90,961.55
  6. Step 6: Final answer
    x = 57,574.31

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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.