Home / 138,122.87-207,184.31-91,364.81

Finding the Fourth Proportional to 138,122.87, 207,184.31 and 91,364.81

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Solution

The fourth proportional to 138,122.87, 207,184.31 and 91,364.81 is: 137,047.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,122.87 : 207,184.31 = 91,364.81 : x
  2. Step 2: Convert to fraction form
    138,122.87/207,184.31 = 91,364.81/x
  3. Step 3: Cross multiply
    138,122.87x = 207,184.31 × 91,364.81
  4. Step 4: Simplify right side
    138,122.87x = 18,929,354,661.31
  5. Step 5: Solve for x
    x = 18,929,354,661.31/138,122.87
  6. Step 6: Final answer
    x = 137,047.22

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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.