Home / 90,709.89-136,077.15-31,537.90

Finding the Fourth Proportional to 90,709.89, 136,077.15 and 31,537.90

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Solution

The fourth proportional to 90,709.89, 136,077.15 and 31,537.90 is: 47,311.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,709.89 : 136,077.15 = 31,537.90 : x
  2. Step 2: Convert to fraction form
    90,709.89/136,077.15 = 31,537.90/x
  3. Step 3: Cross multiply
    90,709.89x = 136,077.15 × 31,537.90
  4. Step 4: Simplify right side
    90,709.89x = 4,291,587,391.30
  5. Step 5: Solve for x
    x = 4,291,587,391.30/90,709.89
  6. Step 6: Final answer
    x = 47,311.13

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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.