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Finding the Fourth Proportional to 68,854.72, 103,312.64 and 29,436.80

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Solution

The fourth proportional to 68,854.72, 103,312.64 and 29,436.80 is: 44,168.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,854.72 : 103,312.64 = 29,436.80 : x
  2. Step 2: Convert to fraction form
    68,854.72/103,312.64 = 29,436.80/x
  3. Step 3: Cross multiply
    68,854.72x = 103,312.64 × 29,436.80
  4. Step 4: Simplify right side
    68,854.72x = 3,041,193,521.15
  5. Step 5: Solve for x
    x = 3,041,193,521.15/68,854.72
  6. Step 6: Final answer
    x = 44,168.27

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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.