Home / 128,373.05-177,141.15-71,003.25

Finding the Fourth Proportional to 128,373.05, 177,141.15 and 71,003.25

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Solution

The fourth proportional to 128,373.05, 177,141.15 and 71,003.25 is: 97,976.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,373.05 : 177,141.15 = 71,003.25 : x
  2. Step 2: Convert to fraction form
    128,373.05/177,141.15 = 71,003.25/x
  3. Step 3: Cross multiply
    128,373.05x = 177,141.15 × 71,003.25
  4. Step 4: Simplify right side
    128,373.05x = 12,577,597,358.74
  5. Step 5: Solve for x
    x = 12,577,597,358.74/128,373.05
  6. Step 6: Final answer
    x = 97,976.93

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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.