Home / 100,170.32-138,233.76-57,732.80

Finding the Fourth Proportional to 100,170.32, 138,233.76 and 57,732.80

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Solution

The fourth proportional to 100,170.32, 138,233.76 and 57,732.80 is: 79,670.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,170.32 : 138,233.76 = 57,732.80 : x
  2. Step 2: Convert to fraction form
    100,170.32/138,233.76 = 57,732.80/x
  3. Step 3: Cross multiply
    100,170.32x = 138,233.76 × 57,732.80
  4. Step 4: Simplify right side
    100,170.32x = 7,980,622,019.33
  5. Step 5: Solve for x
    x = 7,980,622,019.33/100,170.32
  6. Step 6: Final answer
    x = 79,670.53

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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.