Home / 100,557.38-138,754.15-57,530.04

Finding the Fourth Proportional to 100,557.38, 138,754.15 and 57,530.04

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Solution

The fourth proportional to 100,557.38, 138,754.15 and 57,530.04 is: 79,382.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,557.38 : 138,754.15 = 57,530.04 : x
  2. Step 2: Convert to fraction form
    100,557.38/138,754.15 = 57,530.04/x
  3. Step 3: Cross multiply
    100,557.38x = 138,754.15 × 57,530.04
  4. Step 4: Simplify right side
    100,557.38x = 7,982,531,525.76
  5. Step 5: Solve for x
    x = 7,982,531,525.76/100,557.38
  6. Step 6: Final answer
    x = 79,382.85

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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.