Home / 90,738.28-136,141.98-31,580.20

Finding the Fourth Proportional to 90,738.28, 136,141.98 and 31,580.20

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Solution

The fourth proportional to 90,738.28, 136,141.98 and 31,580.20 is: 47,382.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,738.28 : 136,141.98 = 31,580.20 : x
  2. Step 2: Convert to fraction form
    90,738.28/136,141.98 = 31,580.20/x
  3. Step 3: Cross multiply
    90,738.28x = 136,141.98 × 31,580.20
  4. Step 4: Simplify right side
    90,738.28x = 4,299,390,956.80
  5. Step 5: Solve for x
    x = 4,299,390,956.80/90,738.28
  6. Step 6: Final answer
    x = 47,382.33

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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.