Home / 128,669.13-177,558.30-71,310.88

Finding the Fourth Proportional to 128,669.13, 177,558.30 and 71,310.88

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Solution

The fourth proportional to 128,669.13, 177,558.30 and 71,310.88 is: 98,406.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,669.13 : 177,558.30 = 71,310.88 : x
  2. Step 2: Convert to fraction form
    128,669.13/177,558.30 = 71,310.88/x
  3. Step 3: Cross multiply
    128,669.13x = 177,558.30 × 71,310.88
  4. Step 4: Simplify right side
    128,669.13x = 12,661,838,624.30
  5. Step 5: Solve for x
    x = 12,661,838,624.30/128,669.13
  6. Step 6: Final answer
    x = 98,406.19

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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.