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Finding the Fourth Proportional to 121,411.30, 182,116.95 and 68,923.30

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Solution

The fourth proportional to 121,411.30, 182,116.95 and 68,923.30 is: 103,384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,411.30 : 182,116.95 = 68,923.30 : x
  2. Step 2: Convert to fraction form
    121,411.30/182,116.95 = 68,923.30/x
  3. Step 3: Cross multiply
    121,411.30x = 182,116.95 × 68,923.30
  4. Step 4: Simplify right side
    121,411.30x = 12,552,101,179.94
  5. Step 5: Solve for x
    x = 12,552,101,179.94/121,411.30
  6. Step 6: Final answer
    x = 103,384.95

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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.