Home / 90,890.14-136,397.49-31,725.81

Finding the Fourth Proportional to 90,890.14, 136,397.49 and 31,725.81

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Solution

The fourth proportional to 90,890.14, 136,397.49 and 31,725.81 is: 47,610.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,890.14 : 136,397.49 = 31,725.81 : x
  2. Step 2: Convert to fraction form
    90,890.14/136,397.49 = 31,725.81/x
  3. Step 3: Cross multiply
    90,890.14x = 136,397.49 × 31,725.81
  4. Step 4: Simplify right side
    90,890.14x = 4,327,320,400.21
  5. Step 5: Solve for x
    x = 4,327,320,400.21/90,890.14
  6. Step 6: Final answer
    x = 47,610.45

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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.