Home / 91,170.12-136,769.64-38,580

Finding the Fourth Proportional to 91,170.12, 136,769.64 and 38,580

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Solution

The fourth proportional to 91,170.12, 136,769.64 and 38,580 is: 57,876.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,170.12 : 136,769.64 = 38,580 : x
  2. Step 2: Convert to fraction form
    91,170.12/136,769.64 = 38,580/x
  3. Step 3: Cross multiply
    91,170.12x = 136,769.64 × 38,580
  4. Step 4: Simplify right side
    91,170.12x = 5,276,572,711.20
  5. Step 5: Solve for x
    x = 5,276,572,711.20/91,170.12
  6. Step 6: Final answer
    x = 57,876.12

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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.