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Finding the Fourth Proportional to 72,908.70, 109,363.05 and 60,467.10

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Solution

The fourth proportional to 72,908.70, 109,363.05 and 60,467.10 is: 90,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.70 : 109,363.05 = 60,467.10 : x
  2. Step 2: Convert to fraction form
    72,908.70/109,363.05 = 60,467.10/x
  3. Step 3: Cross multiply
    72,908.70x = 109,363.05 × 60,467.10
  4. Step 4: Simplify right side
    72,908.70x = 6,612,866,480.66
  5. Step 5: Solve for x
    x = 6,612,866,480.66/72,908.70
  6. Step 6: Final answer
    x = 90,700.65

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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.