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Finding the Fourth Proportional to 68,633.30, 102,949.95 and 40,985.30

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Solution

The fourth proportional to 68,633.30, 102,949.95 and 40,985.30 is: 61,477.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,633.30 : 102,949.95 = 40,985.30 : x
  2. Step 2: Convert to fraction form
    68,633.30/102,949.95 = 40,985.30/x
  3. Step 3: Cross multiply
    68,633.30x = 102,949.95 × 40,985.30
  4. Step 4: Simplify right side
    68,633.30x = 4,219,434,585.74
  5. Step 5: Solve for x
    x = 4,219,434,585.74/68,633.30
  6. Step 6: Final answer
    x = 61,477.95

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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.