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Finding the Fourth Proportional to 68,509.80, 102,687.90 and 29,060.20

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Solution

The fourth proportional to 68,509.80, 102,687.90 and 29,060.20 is: 43,557.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,509.80 : 102,687.90 = 29,060.20 : x
  2. Step 2: Convert to fraction form
    68,509.80/102,687.90 = 29,060.20/x
  3. Step 3: Cross multiply
    68,509.80x = 102,687.90 × 29,060.20
  4. Step 4: Simplify right side
    68,509.80x = 2,984,130,911.58
  5. Step 5: Solve for x
    x = 2,984,130,911.58/68,509.80
  6. Step 6: Final answer
    x = 43,557.72

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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.