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Finding the Fourth Proportional to 108,707.80, 163,061.70 and 29,821.90

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Solution

The fourth proportional to 108,707.80, 163,061.70 and 29,821.90 is: 44,732.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,707.80 : 163,061.70 = 29,821.90 : x
  2. Step 2: Convert to fraction form
    108,707.80/163,061.70 = 29,821.90/x
  3. Step 3: Cross multiply
    108,707.80x = 163,061.70 × 29,821.90
  4. Step 4: Simplify right side
    108,707.80x = 4,862,809,711.23
  5. Step 5: Solve for x
    x = 4,862,809,711.23/108,707.80
  6. Step 6: Final answer
    x = 44,732.85

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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.