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Finding the Fourth Proportional to 74,643.60, 111,965.40 and 43,150.80

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Solution

The fourth proportional to 74,643.60, 111,965.40 and 43,150.80 is: 64,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.60 : 111,965.40 = 43,150.80 : x
  2. Step 2: Convert to fraction form
    74,643.60/111,965.40 = 43,150.80/x
  3. Step 3: Cross multiply
    74,643.60x = 111,965.40 × 43,150.80
  4. Step 4: Simplify right side
    74,643.60x = 4,831,396,582.32
  5. Step 5: Solve for x
    x = 4,831,396,582.32/74,643.60
  6. Step 6: Final answer
    x = 64,726.20

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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.