Home / 128,517.64-177,373.93-80,127.42

Finding the Fourth Proportional to 128,517.64, 177,373.93 and 80,127.42

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Solution

The fourth proportional to 128,517.64, 177,373.93 and 80,127.42 is: 110,588.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,517.64 : 177,373.93 = 80,127.42 : x
  2. Step 2: Convert to fraction form
    128,517.64/177,373.93 = 80,127.42/x
  3. Step 3: Cross multiply
    128,517.64x = 177,373.93 × 80,127.42
  4. Step 4: Simplify right side
    128,517.64x = 14,212,515,386.16
  5. Step 5: Solve for x
    x = 14,212,515,386.16/128,517.64
  6. Step 6: Final answer
    x = 110,588.05

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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.