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Finding the Fourth Proportional to 138,570.77, 207,700.62 and 68,499.29

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Solution

The fourth proportional to 138,570.77, 207,700.62 and 68,499.29 is: 102,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,570.77 : 207,700.62 = 68,499.29 : x
  2. Step 2: Convert to fraction form
    138,570.77/207,700.62 = 68,499.29/x
  3. Step 3: Cross multiply
    138,570.77x = 207,700.62 × 68,499.29
  4. Step 4: Simplify right side
    138,570.77x = 14,227,345,002.56
  5. Step 5: Solve for x
    x = 14,227,345,002.56/138,570.77
  6. Step 6: Final answer
    x = 102,672.05

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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.