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Finding the Fourth Proportional to 118,340, 163,302.72 and 67,351.20

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Solution

The fourth proportional to 118,340, 163,302.72 and 67,351.20 is: 92,940.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,340 : 163,302.72 = 67,351.20 : x
  2. Step 2: Convert to fraction form
    118,340/163,302.72 = 67,351.20/x
  3. Step 3: Cross multiply
    118,340x = 163,302.72 × 67,351.20
  4. Step 4: Simplify right side
    118,340x = 10,998,634,155.26
  5. Step 5: Solve for x
    x = 10,998,634,155.26/118,340
  6. Step 6: Final answer
    x = 92,940.97

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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.