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Finding the Fourth Proportional to 103,616.64, 155,424.95 and 68,548.09

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Solution

The fourth proportional to 103,616.64, 155,424.95 and 68,548.09 is: 102,822.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,616.64 : 155,424.95 = 68,548.09 : x
  2. Step 2: Convert to fraction form
    103,616.64/155,424.95 = 68,548.09/x
  3. Step 3: Cross multiply
    103,616.64x = 155,424.95 × 68,548.09
  4. Step 4: Simplify right side
    103,616.64x = 10,654,083,460.85
  5. Step 5: Solve for x
    x = 10,654,083,460.85/103,616.64
  6. Step 6: Final answer
    x = 102,822.13

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1.5x scale

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.