Home / 128,511.80-177,346.26-71,923.17

Finding the Fourth Proportional to 128,511.80, 177,346.26 and 71,923.17

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Solution

The fourth proportional to 128,511.80, 177,346.26 and 71,923.17 is: 99,253.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.80 : 177,346.26 = 71,923.17 : x
  2. Step 2: Convert to fraction form
    128,511.80/177,346.26 = 71,923.17/x
  3. Step 3: Cross multiply
    128,511.80x = 177,346.26 × 71,923.17
  4. Step 4: Simplify right side
    128,511.80x = 12,755,305,871.89
  5. Step 5: Solve for x
    x = 12,755,305,871.89/128,511.80
  6. Step 6: Final answer
    x = 99,253.97

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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.