Home / 90,889.11-136,373.36-31,767.21

Finding the Fourth Proportional to 90,889.11, 136,373.36 and 31,767.21

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Solution

The fourth proportional to 90,889.11, 136,373.36 and 31,767.21 is: 47,664.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,889.11 : 136,373.36 = 31,767.21 : x
  2. Step 2: Convert to fraction form
    90,889.11/136,373.36 = 31,767.21/x
  3. Step 3: Cross multiply
    90,889.11x = 136,373.36 × 31,767.21
  4. Step 4: Simplify right side
    90,889.11x = 4,332,201,165.53
  5. Step 5: Solve for x
    x = 4,332,201,165.53/90,889.11
  6. Step 6: Final answer
    x = 47,664.69

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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.