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Finding the Fourth Proportional to 68,977.65, 103,411.80 and 37,812.90

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Solution

The fourth proportional to 68,977.65, 103,411.80 and 37,812.90 is: 56,689.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,977.65 : 103,411.80 = 37,812.90 : x
  2. Step 2: Convert to fraction form
    68,977.65/103,411.80 = 37,812.90/x
  3. Step 3: Cross multiply
    68,977.65x = 103,411.80 × 37,812.90
  4. Step 4: Simplify right side
    68,977.65x = 3,910,300,052.22
  5. Step 5: Solve for x
    x = 3,910,300,052.22/68,977.65
  6. Step 6: Final answer
    x = 56,689.38

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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.