Home / 128,513.31-177,327.21-80,732.82

Finding the Fourth Proportional to 128,513.31, 177,327.21 and 80,732.82

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Solution

The fourth proportional to 128,513.31, 177,327.21 and 80,732.82 is: 111,398.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,513.31 : 177,327.21 = 80,732.82 : x
  2. Step 2: Convert to fraction form
    128,513.31/177,327.21 = 80,732.82/x
  3. Step 3: Cross multiply
    128,513.31x = 177,327.21 × 80,732.82
  4. Step 4: Simplify right side
    128,513.31x = 14,316,125,726.03
  5. Step 5: Solve for x
    x = 14,316,125,726.03/128,513.31
  6. Step 6: Final answer
    x = 111,398.00

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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.