Home / 128,417.31-177,206.27-71,817.75

Finding the Fourth Proportional to 128,417.31, 177,206.27 and 71,817.75

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Solution

The fourth proportional to 128,417.31, 177,206.27 and 71,817.75 is: 99,103.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,417.31 : 177,206.27 = 71,817.75 : x
  2. Step 2: Convert to fraction form
    128,417.31/177,206.27 = 71,817.75/x
  3. Step 3: Cross multiply
    128,417.31x = 177,206.27 × 71,817.75
  4. Step 4: Simplify right side
    128,417.31x = 12,726,555,238.20
  5. Step 5: Solve for x
    x = 12,726,555,238.20/128,417.31
  6. Step 6: Final answer
    x = 99,103.11

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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.