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Finding the Fourth Proportional to 143,761.66, 215,554.65 and 68,904.70

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Solution

The fourth proportional to 143,761.66, 215,554.65 and 68,904.70 is: 103,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,761.66 : 215,554.65 = 68,904.70 : x
  2. Step 2: Convert to fraction form
    143,761.66/215,554.65 = 68,904.70/x
  3. Step 3: Cross multiply
    143,761.66x = 215,554.65 × 68,904.70
  4. Step 4: Simplify right side
    143,761.66x = 14,852,728,491.86
  5. Step 5: Solve for x
    x = 14,852,728,491.86/143,761.66
  6. Step 6: Final answer
    x = 103,314.95

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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.