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Finding the Fourth Proportional to 138,569.77, 207,699.13 and 68,498.29

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Solution

The fourth proportional to 138,569.77, 207,699.13 and 68,498.29 is: 102,670.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,569.77 : 207,699.13 = 68,498.29 : x
  2. Step 2: Convert to fraction form
    138,569.77/207,699.13 = 68,498.29/x
  3. Step 3: Cross multiply
    138,569.77x = 207,699.13 × 68,498.29
  4. Step 4: Simplify right side
    138,569.77x = 14,227,033,858.50
  5. Step 5: Solve for x
    x = 14,227,033,858.50/138,569.77
  6. Step 6: Final answer
    x = 102,670.55

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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.