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Finding the Fourth Proportional to 124,621.50, 171,978.39 and 68,033.46

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Solution

The fourth proportional to 124,621.50, 171,978.39 and 68,033.46 is: 93,886.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,621.50 : 171,978.39 = 68,033.46 : x
  2. Step 2: Convert to fraction form
    124,621.50/171,978.39 = 68,033.46/x
  3. Step 3: Cross multiply
    124,621.50x = 171,978.39 × 68,033.46
  4. Step 4: Simplify right side
    124,621.50x = 11,700,284,916.93
  5. Step 5: Solve for x
    x = 11,700,284,916.93/124,621.50
  6. Step 6: Final answer
    x = 93,886.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.