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Finding the Fourth Proportional to 72,024.72, 108,069.48 and 45,722.40

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Solution

The fourth proportional to 72,024.72, 108,069.48 and 45,722.40 is: 68,604.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,024.72 : 108,069.48 = 45,722.40 : x
  2. Step 2: Convert to fraction form
    72,024.72/108,069.48 = 45,722.40/x
  3. Step 3: Cross multiply
    72,024.72x = 108,069.48 × 45,722.40
  4. Step 4: Simplify right side
    72,024.72x = 4,941,195,992.35
  5. Step 5: Solve for x
    x = 4,941,195,992.35/72,024.72
  6. Step 6: Final answer
    x = 68,604.17

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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.