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Finding the Fourth Proportional to 69,143.86, 95,420.19 and 38,930.19

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Solution

The fourth proportional to 69,143.86, 95,420.19 and 38,930.19 is: 53,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,143.86 : 95,420.19 = 38,930.19 : x
  2. Step 2: Convert to fraction form
    69,143.86/95,420.19 = 38,930.19/x
  3. Step 3: Cross multiply
    69,143.86x = 95,420.19 × 38,930.19
  4. Step 4: Simplify right side
    69,143.86x = 3,714,726,126.54
  5. Step 5: Solve for x
    x = 3,714,726,126.54/69,143.86
  6. Step 6: Final answer
    x = 53,724.60

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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.