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Finding the Fourth Proportional to 68,977.66, 103,597.71 and 42,864.88

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Solution

The fourth proportional to 68,977.66, 103,597.71 and 42,864.88 is: 64,378.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,977.66 : 103,597.71 = 42,864.88 : x
  2. Step 2: Convert to fraction form
    68,977.66/103,597.71 = 42,864.88/x
  3. Step 3: Cross multiply
    68,977.66x = 103,597.71 × 42,864.88
  4. Step 4: Simplify right side
    68,977.66x = 4,440,703,407.42
  5. Step 5: Solve for x
    x = 4,440,703,407.42/68,977.66
  6. Step 6: Final answer
    x = 64,378.86

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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.