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Finding the Fourth Proportional to 118,378.78, 163,367.52 and 68,077.78

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Solution

The fourth proportional to 118,378.78, 163,367.52 and 68,077.78 is: 93,950.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,378.78 : 163,367.52 = 68,077.78 : x
  2. Step 2: Convert to fraction form
    118,378.78/163,367.52 = 68,077.78/x
  3. Step 3: Cross multiply
    118,378.78x = 163,367.52 × 68,077.78
  4. Step 4: Simplify right side
    118,378.78x = 11,121,698,085.71
  5. Step 5: Solve for x
    x = 11,121,698,085.71/118,378.78
  6. Step 6: Final answer
    x = 93,950.10

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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.