Home / 100,257.53-138,350.12-57,235.33

Finding the Fourth Proportional to 100,257.53, 138,350.12 and 57,235.33

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Solution

The fourth proportional to 100,257.53, 138,350.12 and 57,235.33 is: 78,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,257.53 : 138,350.12 = 57,235.33 : x
  2. Step 2: Convert to fraction form
    100,257.53/138,350.12 = 57,235.33/x
  3. Step 3: Cross multiply
    100,257.53x = 138,350.12 × 57,235.33
  4. Step 4: Simplify right side
    100,257.53x = 7,918,514,570.95
  5. Step 5: Solve for x
    x = 7,918,514,570.95/100,257.53
  6. Step 6: Final answer
    x = 78,981.74

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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.