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Finding the Fourth Proportional to 52,540.80, 78,811.20 and 49,430.40

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Solution

The fourth proportional to 52,540.80, 78,811.20 and 49,430.40 is: 74,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,540.80 : 78,811.20 = 49,430.40 : x
  2. Step 2: Convert to fraction form
    52,540.80/78,811.20 = 49,430.40/x
  3. Step 3: Cross multiply
    52,540.80x = 78,811.20 × 49,430.40
  4. Step 4: Simplify right side
    52,540.80x = 3,895,669,140.48
  5. Step 5: Solve for x
    x = 3,895,669,140.48/52,540.80
  6. Step 6: Final answer
    x = 74,145.60

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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.