Home / 129,347.85-178,499.37-72,759.63

Finding the Fourth Proportional to 129,347.85, 178,499.37 and 72,759.63

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Solution

The fourth proportional to 129,347.85, 178,499.37 and 72,759.63 is: 100,407.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,347.85 : 178,499.37 = 72,759.63 : x
  2. Step 2: Convert to fraction form
    129,347.85/178,499.37 = 72,759.63/x
  3. Step 3: Cross multiply
    129,347.85x = 178,499.37 × 72,759.63
  4. Step 4: Simplify right side
    129,347.85x = 12,987,548,116.43
  5. Step 5: Solve for x
    x = 12,987,548,116.43/129,347.85
  6. Step 6: Final answer
    x = 100,407.92

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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.