Home / 128,686.14-177,593.94-71,324.28

Finding the Fourth Proportional to 128,686.14, 177,593.94 and 71,324.28

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Solution

The fourth proportional to 128,686.14, 177,593.94 and 71,324.28 is: 98,431.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,686.14 : 177,593.94 = 71,324.28 : x
  2. Step 2: Convert to fraction form
    128,686.14/177,593.94 = 71,324.28/x
  3. Step 3: Cross multiply
    128,686.14x = 177,593.94 × 71,324.28
  4. Step 4: Simplify right side
    128,686.14x = 12,666,759,902.86
  5. Step 5: Solve for x
    x = 12,666,759,902.86/128,686.14
  6. Step 6: Final answer
    x = 98,431.42

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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.