Home / 100,215.52-138,297.12-57,773.68

Finding the Fourth Proportional to 100,215.52, 138,297.12 and 57,773.68

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Solution

The fourth proportional to 100,215.52, 138,297.12 and 57,773.68 is: 79,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,215.52 : 138,297.12 = 57,773.68 : x
  2. Step 2: Convert to fraction form
    100,215.52/138,297.12 = 57,773.68/x
  3. Step 3: Cross multiply
    100,215.52x = 138,297.12 × 57,773.68
  4. Step 4: Simplify right side
    100,215.52x = 7,989,933,555.80
  5. Step 5: Solve for x
    x = 7,989,933,555.80/100,215.52
  6. Step 6: Final answer
    x = 79,727.51

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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.