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Finding the Fourth Proportional to 138,008.53, 207,012.54 and 43,245.98

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Solution

The fourth proportional to 138,008.53, 207,012.54 and 43,245.98 is: 64,868.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,008.53 : 207,012.54 = 43,245.98 : x
  2. Step 2: Convert to fraction form
    138,008.53/207,012.54 = 43,245.98/x
  3. Step 3: Cross multiply
    138,008.53x = 207,012.54 × 43,245.98
  4. Step 4: Simplify right side
    138,008.53x = 8,952,459,120.89
  5. Step 5: Solve for x
    x = 8,952,459,120.89/138,008.53
  6. Step 6: Final answer
    x = 64,868.88

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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.