Home / 129,330.88-178,474.89-72,742.26

Finding the Fourth Proportional to 129,330.88, 178,474.89 and 72,742.26

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Solution

The fourth proportional to 129,330.88, 178,474.89 and 72,742.26 is: 100,383.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,330.88 : 178,474.89 = 72,742.26 : x
  2. Step 2: Convert to fraction form
    129,330.88/178,474.89 = 72,742.26/x
  3. Step 3: Cross multiply
    129,330.88x = 178,474.89 × 72,742.26
  4. Step 4: Simplify right side
    129,330.88x = 12,982,666,851.85
  5. Step 5: Solve for x
    x = 12,982,666,851.85/129,330.88
  6. Step 6: Final answer
    x = 100,383.35

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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.