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Finding the Fourth Proportional to 68,143.62, 102,215.81 and 60,681.76

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Solution

The fourth proportional to 68,143.62, 102,215.81 and 60,681.76 is: 91,022.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,143.62 : 102,215.81 = 60,681.76 : x
  2. Step 2: Convert to fraction form
    68,143.62/102,215.81 = 60,681.76/x
  3. Step 3: Cross multiply
    68,143.62x = 102,215.81 × 60,681.76
  4. Step 4: Simplify right side
    68,143.62x = 6,202,635,250.63
  5. Step 5: Solve for x
    x = 6,202,635,250.63/68,143.62
  6. Step 6: Final answer
    x = 91,022.98

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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.