Home / 128,918.63-177,904.29-71,557.79

Finding the Fourth Proportional to 128,918.63, 177,904.29 and 71,557.79

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Solution

The fourth proportional to 128,918.63, 177,904.29 and 71,557.79 is: 98,747.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,918.63 : 177,904.29 = 71,557.79 : x
  2. Step 2: Convert to fraction form
    128,918.63/177,904.29 = 71,557.79/x
  3. Step 3: Cross multiply
    128,918.63x = 177,904.29 × 71,557.79
  4. Step 4: Simplify right side
    128,918.63x = 12,730,438,268.68
  5. Step 5: Solve for x
    x = 12,730,438,268.68/128,918.63
  6. Step 6: Final answer
    x = 98,747.85

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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.