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Finding the Fourth Proportional to 71,747.60, 107,621.40 and 45,503.60

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Solution

The fourth proportional to 71,747.60, 107,621.40 and 45,503.60 is: 68,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,747.60 : 107,621.40 = 45,503.60 : x
  2. Step 2: Convert to fraction form
    71,747.60/107,621.40 = 45,503.60/x
  3. Step 3: Cross multiply
    71,747.60x = 107,621.40 × 45,503.60
  4. Step 4: Simplify right side
    71,747.60x = 4,897,161,137.04
  5. Step 5: Solve for x
    x = 4,897,161,137.04/71,747.60
  6. Step 6: Final answer
    x = 68,255.40

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1.5x scale

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.