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Finding the Fourth Proportional to 52,591.20, 78,886.80 and 40,840.80

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Solution

The fourth proportional to 52,591.20, 78,886.80 and 40,840.80 is: 61,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,591.20 : 78,886.80 = 40,840.80 : x
  2. Step 2: Convert to fraction form
    52,591.20/78,886.80 = 40,840.80/x
  3. Step 3: Cross multiply
    52,591.20x = 78,886.80 × 40,840.80
  4. Step 4: Simplify right side
    52,591.20x = 3,221,800,021.44
  5. Step 5: Solve for x
    x = 3,221,800,021.44/52,591.20
  6. Step 6: Final answer
    x = 61,261.20

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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.