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Finding the Fourth Proportional to 68,417.85, 102,612.12 and 39,935.82

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Solution

The fourth proportional to 68,417.85, 102,612.12 and 39,935.82 is: 59,895.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,417.85 : 102,612.12 = 39,935.82 : x
  2. Step 2: Convert to fraction form
    68,417.85/102,612.12 = 39,935.82/x
  3. Step 3: Cross multiply
    68,417.85x = 102,612.12 × 39,935.82
  4. Step 4: Simplify right side
    68,417.85x = 4,097,899,154.14
  5. Step 5: Solve for x
    x = 4,097,899,154.14/68,417.85
  6. Step 6: Final answer
    x = 59,895.18

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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.