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Finding the Fourth Proportional to 73,412.80, 110,119.20 and 43,815.40

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Solution

The fourth proportional to 73,412.80, 110,119.20 and 43,815.40 is: 65,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,412.80 : 110,119.20 = 43,815.40 : x
  2. Step 2: Convert to fraction form
    73,412.80/110,119.20 = 43,815.40/x
  3. Step 3: Cross multiply
    73,412.80x = 110,119.20 × 43,815.40
  4. Step 4: Simplify right side
    73,412.80x = 4,824,916,795.68
  5. Step 5: Solve for x
    x = 4,824,916,795.68/73,412.80
  6. Step 6: Final answer
    x = 65,723.10

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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.