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Finding the Fourth Proportional to 78,452.40, 108,289.08 and 50,158.20

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Solution

The fourth proportional to 78,452.40, 108,289.08 and 50,158.20 is: 69,234.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,452.40 : 108,289.08 = 50,158.20 : x
  2. Step 2: Convert to fraction form
    78,452.40/108,289.08 = 50,158.20/x
  3. Step 3: Cross multiply
    78,452.40x = 108,289.08 × 50,158.20
  4. Step 4: Simplify right side
    78,452.40x = 5,431,585,332.46
  5. Step 5: Solve for x
    x = 5,431,585,332.46/78,452.40
  6. Step 6: Final answer
    x = 69,234.15

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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.