Home / 90,589.44-136,013.76-51,139.20

Finding the Fourth Proportional to 90,589.44, 136,013.76 and 51,139.20

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Solution

The fourth proportional to 90,589.44, 136,013.76 and 51,139.20 is: 76,781.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,589.44 : 136,013.76 = 51,139.20 : x
  2. Step 2: Convert to fraction form
    90,589.44/136,013.76 = 51,139.20/x
  3. Step 3: Cross multiply
    90,589.44x = 136,013.76 × 51,139.20
  4. Step 4: Simplify right side
    90,589.44x = 6,955,634,875.39
  5. Step 5: Solve for x
    x = 6,955,634,875.39/90,589.44
  6. Step 6: Final answer
    x = 76,781.96

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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.