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Finding the Fourth Proportional to 74,649.60, 111,844.80 and 48,340.80

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Solution

The fourth proportional to 74,649.60, 111,844.80 and 48,340.80 is: 72,427.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,649.60 : 111,844.80 = 48,340.80 : x
  2. Step 2: Convert to fraction form
    74,649.60/111,844.80 = 48,340.80/x
  3. Step 3: Cross multiply
    74,649.60x = 111,844.80 × 48,340.80
  4. Step 4: Simplify right side
    74,649.60x = 5,406,667,107.84
  5. Step 5: Solve for x
    x = 5,406,667,107.84/74,649.60
  6. Step 6: Final answer
    x = 72,427.28

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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.