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Finding the Fourth Proportional to 103,628.64, 155,442.95 and 68,560.09

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Solution

The fourth proportional to 103,628.64, 155,442.95 and 68,560.09 is: 102,840.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,628.64 : 155,442.95 = 68,560.09 : x
  2. Step 2: Convert to fraction form
    103,628.64/155,442.95 = 68,560.09/x
  3. Step 3: Cross multiply
    103,628.64x = 155,442.95 × 68,560.09
  4. Step 4: Simplify right side
    103,628.64x = 10,657,182,641.87
  5. Step 5: Solve for x
    x = 10,657,182,641.87/103,628.64
  6. Step 6: Final answer
    x = 102,840.13

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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.