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Finding the Fourth Proportional to 73,412.80, 110,119.20 and 72,894.40

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Solution

The fourth proportional to 73,412.80, 110,119.20 and 72,894.40 is: 109,341.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,412.80 : 110,119.20 = 72,894.40 : x
  2. Step 2: Convert to fraction form
    73,412.80/110,119.20 = 72,894.40/x
  3. Step 3: Cross multiply
    73,412.80x = 110,119.20 × 72,894.40
  4. Step 4: Simplify right side
    73,412.80x = 8,027,073,012.48
  5. Step 5: Solve for x
    x = 8,027,073,012.48/73,412.80
  6. Step 6: Final answer
    x = 109,341.60

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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.