Home / 100,315.12-138,339.36-60,022.48

Finding the Fourth Proportional to 100,315.12, 138,339.36 and 60,022.48

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Solution

The fourth proportional to 100,315.12, 138,339.36 and 60,022.48 is: 82,773.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,315.12 : 138,339.36 = 60,022.48 : x
  2. Step 2: Convert to fraction form
    100,315.12/138,339.36 = 60,022.48/x
  3. Step 3: Cross multiply
    100,315.12x = 138,339.36 × 60,022.48
  4. Step 4: Simplify right side
    100,315.12x = 8,303,471,468.81
  5. Step 5: Solve for x
    x = 8,303,471,468.81/100,315.12
  6. Step 6: Final answer
    x = 82,773.88

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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.