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Finding the Fourth Proportional to 47,819.20, 71,728.80 and 36,781.60

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Solution

The fourth proportional to 47,819.20, 71,728.80 and 36,781.60 is: 55,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,819.20 : 71,728.80 = 36,781.60 : x
  2. Step 2: Convert to fraction form
    47,819.20/71,728.80 = 36,781.60/x
  3. Step 3: Cross multiply
    47,819.20x = 71,728.80 × 36,781.60
  4. Step 4: Simplify right side
    47,819.20x = 2,638,300,030.08
  5. Step 5: Solve for x
    x = 2,638,300,030.08/47,819.20
  6. Step 6: Final answer
    x = 55,172.40

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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.