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Finding the Fourth Proportional to 68,890.50, 103,322.16 and 18,957.78

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Solution

The fourth proportional to 68,890.50, 103,322.16 and 18,957.78 is: 28,432.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,890.50 : 103,322.16 = 18,957.78 : x
  2. Step 2: Convert to fraction form
    68,890.50/103,322.16 = 18,957.78/x
  3. Step 3: Cross multiply
    68,890.50x = 103,322.16 × 18,957.78
  4. Step 4: Simplify right side
    68,890.50x = 1,958,758,778.40
  5. Step 5: Solve for x
    x = 1,958,758,778.40/68,890.50
  6. Step 6: Final answer
    x = 28,432.93

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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.