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Finding the Fourth Proportional to 72,630.20, 108,945.30 and 68,547.80

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Solution

The fourth proportional to 72,630.20, 108,945.30 and 68,547.80 is: 102,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.20 : 108,945.30 = 68,547.80 : x
  2. Step 2: Convert to fraction form
    72,630.20/108,945.30 = 68,547.80/x
  3. Step 3: Cross multiply
    72,630.20x = 108,945.30 × 68,547.80
  4. Step 4: Simplify right side
    72,630.20x = 7,467,960,635.34
  5. Step 5: Solve for x
    x = 7,467,960,635.34/72,630.20
  6. Step 6: Final answer
    x = 102,821.70

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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.