Home / 90,789.72-136,188.24-31,631.38

Finding the Fourth Proportional to 90,789.72, 136,188.24 and 31,631.38

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Solution

The fourth proportional to 90,789.72, 136,188.24 and 31,631.38 is: 47,448.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,789.72 : 136,188.24 = 31,631.38 : x
  2. Step 2: Convert to fraction form
    90,789.72/136,188.24 = 31,631.38/x
  3. Step 3: Cross multiply
    90,789.72x = 136,188.24 × 31,631.38
  4. Step 4: Simplify right side
    90,789.72x = 4,307,821,970.97
  5. Step 5: Solve for x
    x = 4,307,821,970.97/90,789.72
  6. Step 6: Final answer
    x = 47,448.35

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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.