Home / 129,177.40-178,267.86-71,818.46

Finding the Fourth Proportional to 129,177.40, 178,267.86 and 71,818.46

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Solution

The fourth proportional to 129,177.40, 178,267.86 and 71,818.46 is: 99,111.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,177.40 : 178,267.86 = 71,818.46 : x
  2. Step 2: Convert to fraction form
    129,177.40/178,267.86 = 71,818.46/x
  3. Step 3: Cross multiply
    129,177.40x = 178,267.86 × 71,818.46
  4. Step 4: Simplify right side
    129,177.40x = 12,802,923,172.70
  5. Step 5: Solve for x
    x = 12,802,923,172.70/129,177.40
  6. Step 6: Final answer
    x = 99,111.17

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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.