Home / 128,864.65-193,315.20-40,108.90

Finding the Fourth Proportional to 128,864.65, 193,315.20 and 40,108.90

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Solution

The fourth proportional to 128,864.65, 193,315.20 and 40,108.90 is: 60,169.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,864.65 : 193,315.20 = 40,108.90 : x
  2. Step 2: Convert to fraction form
    128,864.65/193,315.20 = 40,108.90/x
  3. Step 3: Cross multiply
    128,864.65x = 193,315.20 × 40,108.90
  4. Step 4: Simplify right side
    128,864.65x = 7,753,660,025.28
  5. Step 5: Solve for x
    x = 7,753,660,025.28/128,864.65
  6. Step 6: Final answer
    x = 60,169.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.