Home / 129,901.25-179,244.48-78,887.38

Finding the Fourth Proportional to 129,901.25, 179,244.48 and 78,887.38

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Solution

The fourth proportional to 129,901.25, 179,244.48 and 78,887.38 is: 108,852.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,901.25 : 179,244.48 = 78,887.38 : x
  2. Step 2: Convert to fraction form
    129,901.25/179,244.48 = 78,887.38/x
  3. Step 3: Cross multiply
    129,901.25x = 179,244.48 × 78,887.38
  4. Step 4: Simplify right side
    129,901.25x = 14,140,127,406.66
  5. Step 5: Solve for x
    x = 14,140,127,406.66/129,901.25
  6. Step 6: Final answer
    x = 108,852.90

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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.