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Finding the Fourth Proportional to 103,616.26, 155,424.40 and 68,547.72

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Solution

The fourth proportional to 103,616.26, 155,424.40 and 68,547.72 is: 102,821.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,616.26 : 155,424.40 = 68,547.72 : x
  2. Step 2: Convert to fraction form
    103,616.26/155,424.40 = 68,547.72/x
  3. Step 3: Cross multiply
    103,616.26x = 155,424.40 × 68,547.72
  4. Step 4: Simplify right side
    103,616.26x = 10,653,988,252.37
  5. Step 5: Solve for x
    x = 10,653,988,252.37/103,616.26
  6. Step 6: Final answer
    x = 102,821.59

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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.