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Finding the Fourth Proportional to 103,182.78, 142,339.83 and 67,393.74

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Solution

The fourth proportional to 103,182.78, 142,339.83 and 67,393.74 is: 92,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,182.78 : 142,339.83 = 67,393.74 : x
  2. Step 2: Convert to fraction form
    103,182.78/142,339.83 = 67,393.74/x
  3. Step 3: Cross multiply
    103,182.78x = 142,339.83 × 67,393.74
  4. Step 4: Simplify right side
    103,182.78x = 9,592,813,494.66
  5. Step 5: Solve for x
    x = 9,592,813,494.66/103,182.78
  6. Step 6: Final answer
    x = 92,969.13

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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.