Home / 138,126.57-207,189.84-91,368.51

Finding the Fourth Proportional to 138,126.57, 207,189.84 and 91,368.51

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Solution

The fourth proportional to 138,126.57, 207,189.84 and 91,368.51 is: 137,052.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,126.57 : 207,189.84 = 91,368.51 : x
  2. Step 2: Convert to fraction form
    138,126.57/207,189.84 = 91,368.51/x
  3. Step 3: Cross multiply
    138,126.57x = 207,189.84 × 91,368.51
  4. Step 4: Simplify right side
    138,126.57x = 18,930,626,967.94
  5. Step 5: Solve for x
    x = 18,930,626,967.94/138,126.57
  6. Step 6: Final answer
    x = 137,052.76

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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.