Home / 103,144.08-142,419.24-79,232.88

Finding the Fourth Proportional to 103,144.08, 142,419.24 and 79,232.88

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Solution

The fourth proportional to 103,144.08, 142,419.24 and 79,232.88 is: 109,403.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,144.08 : 142,419.24 = 79,232.88 : x
  2. Step 2: Convert to fraction form
    103,144.08/142,419.24 = 79,232.88/x
  3. Step 3: Cross multiply
    103,144.08x = 142,419.24 × 79,232.88
  4. Step 4: Simplify right side
    103,144.08x = 11,284,286,552.61
  5. Step 5: Solve for x
    x = 11,284,286,552.61/103,144.08
  6. Step 6: Final answer
    x = 109,403.14

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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.