Home / 90,904.26-136,319.12-31,719.98

Finding the Fourth Proportional to 90,904.26, 136,319.12 and 31,719.98

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Solution

The fourth proportional to 90,904.26, 136,319.12 and 31,719.98 is: 47,566.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,904.26 : 136,319.12 = 31,719.98 : x
  2. Step 2: Convert to fraction form
    90,904.26/136,319.12 = 31,719.98/x
  3. Step 3: Cross multiply
    90,904.26x = 136,319.12 × 31,719.98
  4. Step 4: Simplify right side
    90,904.26x = 4,324,039,760.02
  5. Step 5: Solve for x
    x = 4,324,039,760.02/90,904.26
  6. Step 6: Final answer
    x = 47,566.97

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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.