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Finding the Fourth Proportional to 254,456.80, 381,685.20 and 130,040.80

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Solution

The fourth proportional to 254,456.80, 381,685.20 and 130,040.80 is: 195,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,456.80 : 381,685.20 = 130,040.80 : x
  2. Step 2: Convert to fraction form
    254,456.80/381,685.20 = 130,040.80/x
  3. Step 3: Cross multiply
    254,456.80x = 381,685.20 × 130,040.80
  4. Step 4: Simplify right side
    254,456.80x = 49,634,648,756.16
  5. Step 5: Solve for x
    x = 49,634,648,756.16/254,456.80
  6. Step 6: Final answer
    x = 195,061.20

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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.