Home / 83,531.54-115,162-66,360.87

Finding the Fourth Proportional to 83,531.54, 115,162 and 66,360.87

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Solution

The fourth proportional to 83,531.54, 115,162 and 66,360.87 is: 91,489.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,531.54 : 115,162 = 66,360.87 : x
  2. Step 2: Convert to fraction form
    83,531.54/115,162 = 66,360.87/x
  3. Step 3: Cross multiply
    83,531.54x = 115,162 × 66,360.87
  4. Step 4: Simplify right side
    83,531.54x = 7,642,250,510.94
  5. Step 5: Solve for x
    x = 7,642,250,510.94/83,531.54
  6. Step 6: Final answer
    x = 91,489.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.