Home / 129,135.88-178,203.39-71,774.92

Finding the Fourth Proportional to 129,135.88, 178,203.39 and 71,774.92

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Solution

The fourth proportional to 129,135.88, 178,203.39 and 71,774.92 is: 99,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,135.88 : 178,203.39 = 71,774.92 : x
  2. Step 2: Convert to fraction form
    129,135.88/178,203.39 = 71,774.92/x
  3. Step 3: Cross multiply
    129,135.88x = 178,203.39 × 71,774.92
  4. Step 4: Simplify right side
    129,135.88x = 12,790,534,060.98
  5. Step 5: Solve for x
    x = 12,790,534,060.98/129,135.88
  6. Step 6: Final answer
    x = 99,047.10

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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.