Home / 128,905.82-177,887.35-71,541.81

Finding the Fourth Proportional to 128,905.82, 177,887.35 and 71,541.81

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Solution

The fourth proportional to 128,905.82, 177,887.35 and 71,541.81 is: 98,726.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,905.82 : 177,887.35 = 71,541.81 : x
  2. Step 2: Convert to fraction form
    128,905.82/177,887.35 = 71,541.81/x
  3. Step 3: Cross multiply
    128,905.82x = 177,887.35 × 71,541.81
  4. Step 4: Simplify right side
    128,905.82x = 12,726,382,995.10
  5. Step 5: Solve for x
    x = 12,726,382,995.10/128,905.82
  6. Step 6: Final answer
    x = 98,726.21

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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.