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Finding the Fourth Proportional to 92,940.28, 139,395.78 and 77,246.08

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Solution

The fourth proportional to 92,940.28, 139,395.78 and 77,246.08 is: 115,856.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,940.28 : 139,395.78 = 77,246.08 : x
  2. Step 2: Convert to fraction form
    92,940.28/139,395.78 = 77,246.08/x
  3. Step 3: Cross multiply
    92,940.28x = 139,395.78 × 77,246.08
  4. Step 4: Simplify right side
    92,940.28x = 10,767,777,573.54
  5. Step 5: Solve for x
    x = 10,767,777,573.54/92,940.28
  6. Step 6: Final answer
    x = 115,856.95

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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.