Home / 128,654.28-177,542.91-72,065.65

Finding the Fourth Proportional to 128,654.28, 177,542.91 and 72,065.65

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Solution

The fourth proportional to 128,654.28, 177,542.91 and 72,065.65 is: 99,450.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,654.28 : 177,542.91 = 72,065.65 : x
  2. Step 2: Convert to fraction form
    128,654.28/177,542.91 = 72,065.65/x
  3. Step 3: Cross multiply
    128,654.28x = 177,542.91 × 72,065.65
  4. Step 4: Simplify right side
    128,654.28x = 12,794,745,212.04
  5. Step 5: Solve for x
    x = 12,794,745,212.04/128,654.28
  6. Step 6: Final answer
    x = 99,450.60

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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.