Home / 90,961.42-136,456.71-38,378.65

Finding the Fourth Proportional to 90,961.42, 136,456.71 and 38,378.65

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Solution

The fourth proportional to 90,961.42, 136,456.71 and 38,378.65 is: 57,574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,961.42 : 136,456.71 = 38,378.65 : x
  2. Step 2: Convert to fraction form
    90,961.42/136,456.71 = 38,378.65/x
  3. Step 3: Cross multiply
    90,961.42x = 136,456.71 × 38,378.65
  4. Step 4: Simplify right side
    90,961.42x = 5,237,024,313.24
  5. Step 5: Solve for x
    x = 5,237,024,313.24/90,961.42
  6. Step 6: Final answer
    x = 57,574.13

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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.