Home / 128,871.07-177,843.02-71,510.61

Finding the Fourth Proportional to 128,871.07, 177,843.02 and 71,510.61

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Solution

The fourth proportional to 128,871.07, 177,843.02 and 71,510.61 is: 98,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,871.07 : 177,843.02 = 71,510.61 : x
  2. Step 2: Convert to fraction form
    128,871.07/177,843.02 = 71,510.61/x
  3. Step 3: Cross multiply
    128,871.07x = 177,843.02 × 71,510.61
  4. Step 4: Simplify right side
    128,871.07x = 12,717,663,023.22
  5. Step 5: Solve for x
    x = 12,717,663,023.22/128,871.07
  6. Step 6: Final answer
    x = 98,685.17

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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.