Home / 90,590.19-135,909.38-31,425.76

Finding the Fourth Proportional to 90,590.19, 135,909.38 and 31,425.76

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Solution

The fourth proportional to 90,590.19, 135,909.38 and 31,425.76 is: 47,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,590.19 : 135,909.38 = 31,425.76 : x
  2. Step 2: Convert to fraction form
    90,590.19/135,909.38 = 31,425.76/x
  3. Step 3: Cross multiply
    90,590.19x = 135,909.38 × 31,425.76
  4. Step 4: Simplify right side
    90,590.19x = 4,271,055,975.97
  5. Step 5: Solve for x
    x = 4,271,055,975.97/90,590.19
  6. Step 6: Final answer
    x = 47,147.00

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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.