Home / 128,818.27-177,790.49-71,476.05

Finding the Fourth Proportional to 128,818.27, 177,790.49 and 71,476.05

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Solution

The fourth proportional to 128,818.27, 177,790.49 and 71,476.05 is: 98,648.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,818.27 : 177,790.49 = 71,476.05 : x
  2. Step 2: Convert to fraction form
    128,818.27/177,790.49 = 71,476.05/x
  3. Step 3: Cross multiply
    128,818.27x = 177,790.49 × 71,476.05
  4. Step 4: Simplify right side
    128,818.27x = 12,707,760,829.00
  5. Step 5: Solve for x
    x = 12,707,760,829.00/128,818.27
  6. Step 6: Final answer
    x = 98,648.74

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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.