Home / 90,545.58-135,842.52-31,381.20

Finding the Fourth Proportional to 90,545.58, 135,842.52 and 31,381.20

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Solution

The fourth proportional to 90,545.58, 135,842.52 and 31,381.20 is: 47,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.58 : 135,842.52 = 31,381.20 : x
  2. Step 2: Convert to fraction form
    90,545.58/135,842.52 = 31,381.20/x
  3. Step 3: Cross multiply
    90,545.58x = 135,842.52 × 31,381.20
  4. Step 4: Simplify right side
    90,545.58x = 4,262,901,288.62
  5. Step 5: Solve for x
    x = 4,262,901,288.62/90,545.58
  6. Step 6: Final answer
    x = 47,080.17

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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.