Home / 128,517.04-177,346.56-71,917.48

Finding the Fourth Proportional to 128,517.04, 177,346.56 and 71,917.48

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Solution

The fourth proportional to 128,517.04, 177,346.56 and 71,917.48 is: 99,242.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,517.04 : 177,346.56 = 71,917.48 : x
  2. Step 2: Convert to fraction form
    128,517.04/177,346.56 = 71,917.48/x
  3. Step 3: Cross multiply
    128,517.04x = 177,346.56 × 71,917.48
  4. Step 4: Simplify right side
    128,517.04x = 12,754,317,681.87
  5. Step 5: Solve for x
    x = 12,754,317,681.87/128,517.04
  6. Step 6: Final answer
    x = 99,242.23

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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.