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Finding the Fourth Proportional to 72,680.70, 109,021.05 and 49,061.10

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Solution

The fourth proportional to 72,680.70, 109,021.05 and 49,061.10 is: 73,591.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,680.70 : 109,021.05 = 49,061.10 : x
  2. Step 2: Convert to fraction form
    72,680.70/109,021.05 = 49,061.10/x
  3. Step 3: Cross multiply
    72,680.70x = 109,021.05 × 49,061.10
  4. Step 4: Simplify right side
    72,680.70x = 5,348,692,636.16
  5. Step 5: Solve for x
    x = 5,348,692,636.16/72,680.70
  6. Step 6: Final answer
    x = 73,591.65

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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.