Home / 100,141.35-138,211.15-57,134.87

Finding the Fourth Proportional to 100,141.35, 138,211.15 and 57,134.87

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Solution

The fourth proportional to 100,141.35, 138,211.15 and 57,134.87 is: 78,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,141.35 : 138,211.15 = 57,134.87 : x
  2. Step 2: Convert to fraction form
    100,141.35/138,211.15 = 57,134.87/x
  3. Step 3: Cross multiply
    100,141.35x = 138,211.15 × 57,134.87
  4. Step 4: Simplify right side
    100,141.35x = 7,896,675,396.74
  5. Step 5: Solve for x
    x = 7,896,675,396.74/100,141.35
  6. Step 6: Final answer
    x = 78,855.30

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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.