Home / 100,255.68-138,349.44-57,813.12

Finding the Fourth Proportional to 100,255.68, 138,349.44 and 57,813.12

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Solution

The fourth proportional to 100,255.68, 138,349.44 and 57,813.12 is: 79,780.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,255.68 : 138,349.44 = 57,813.12 : x
  2. Step 2: Convert to fraction form
    100,255.68/138,349.44 = 57,813.12/x
  3. Step 3: Cross multiply
    100,255.68x = 138,349.44 × 57,813.12
  4. Step 4: Simplify right side
    100,255.68x = 7,998,412,776.65
  5. Step 5: Solve for x
    x = 7,998,412,776.65/100,255.68
  6. Step 6: Final answer
    x = 79,780.15

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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.