Home / 128,924.29-177,938.24-81,192.61

Finding the Fourth Proportional to 128,924.29, 177,938.24 and 81,192.61

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Solution

The fourth proportional to 128,924.29, 177,938.24 and 81,192.61 is: 112,060.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,924.29 : 177,938.24 = 81,192.61 : x
  2. Step 2: Convert to fraction form
    128,924.29/177,938.24 = 81,192.61/x
  3. Step 3: Cross multiply
    128,924.29x = 177,938.24 × 81,192.61
  4. Step 4: Simplify right side
    128,924.29x = 14,447,269,437.70
  5. Step 5: Solve for x
    x = 14,447,269,437.70/128,924.29
  6. Step 6: Final answer
    x = 112,060.11

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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.