Home / 128,305.56-177,058-70,943.88

Finding the Fourth Proportional to 128,305.56, 177,058 and 70,943.88

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Solution

The fourth proportional to 128,305.56, 177,058 and 70,943.88 is: 97,900.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,305.56 : 177,058 = 70,943.88 : x
  2. Step 2: Convert to fraction form
    128,305.56/177,058 = 70,943.88/x
  3. Step 3: Cross multiply
    128,305.56x = 177,058 × 70,943.88
  4. Step 4: Simplify right side
    128,305.56x = 12,561,181,505.04
  5. Step 5: Solve for x
    x = 12,561,181,505.04/128,305.56
  6. Step 6: Final answer
    x = 97,900.52

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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.