Home / 128,268.01-177,008.61-71,679.43

Finding the Fourth Proportional to 128,268.01, 177,008.61 and 71,679.43

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Solution

The fourth proportional to 128,268.01, 177,008.61 and 71,679.43 is: 98,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,268.01 : 177,008.61 = 71,679.43 : x
  2. Step 2: Convert to fraction form
    128,268.01/177,008.61 = 71,679.43/x
  3. Step 3: Cross multiply
    128,268.01x = 177,008.61 × 71,679.43
  4. Step 4: Simplify right side
    128,268.01x = 12,687,876,269.89
  5. Step 5: Solve for x
    x = 12,687,876,269.89/128,268.01
  6. Step 6: Final answer
    x = 98,916.92

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1.5x scale

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.