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Finding the Fourth Proportional to 68,989.86, 103,616.10 and 42,877.08

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Solution

The fourth proportional to 68,989.86, 103,616.10 and 42,877.08 is: 64,397.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,989.86 : 103,616.10 = 42,877.08 : x
  2. Step 2: Convert to fraction form
    68,989.86/103,616.10 = 42,877.08/x
  3. Step 3: Cross multiply
    68,989.86x = 103,616.10 × 42,877.08
  4. Step 4: Simplify right side
    68,989.86x = 4,442,755,808.99
  5. Step 5: Solve for x
    x = 4,442,755,808.99/68,989.86
  6. Step 6: Final answer
    x = 64,397.23

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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.