Home / 128,513.06-177,326.87-80,732.57

Finding the Fourth Proportional to 128,513.06, 177,326.87 and 80,732.57

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Solution

The fourth proportional to 128,513.06, 177,326.87 and 80,732.57 is: 111,397.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,513.06 : 177,326.87 = 80,732.57 : x
  2. Step 2: Convert to fraction form
    128,513.06/177,326.87 = 80,732.57/x
  3. Step 3: Cross multiply
    128,513.06x = 177,326.87 × 80,732.57
  4. Step 4: Simplify right side
    128,513.06x = 14,316,053,541.49
  5. Step 5: Solve for x
    x = 14,316,053,541.49/128,513.06
  6. Step 6: Final answer
    x = 111,397.66

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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.