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Finding the Fourth Proportional to 76,818.60, 115,227.90 and 47,140.20

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Solution

The fourth proportional to 76,818.60, 115,227.90 and 47,140.20 is: 70,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,818.60 : 115,227.90 = 47,140.20 : x
  2. Step 2: Convert to fraction form
    76,818.60/115,227.90 = 47,140.20/x
  3. Step 3: Cross multiply
    76,818.60x = 115,227.90 × 47,140.20
  4. Step 4: Simplify right side
    76,818.60x = 5,431,866,251.58
  5. Step 5: Solve for x
    x = 5,431,866,251.58/76,818.60
  6. Step 6: Final answer
    x = 70,710.30

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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.