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Finding the Fourth Proportional to 118,143.20, 163,031.67 and 67,149.20

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Solution

The fourth proportional to 118,143.20, 163,031.67 and 67,149.20 is: 92,662.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,143.20 : 163,031.67 = 67,149.20 : x
  2. Step 2: Convert to fraction form
    118,143.20/163,031.67 = 67,149.20/x
  3. Step 3: Cross multiply
    118,143.20x = 163,031.67 × 67,149.20
  4. Step 4: Simplify right side
    118,143.20x = 10,947,445,400.01
  5. Step 5: Solve for x
    x = 10,947,445,400.01/118,143.20
  6. Step 6: Final answer
    x = 92,662.51

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1.5x scale

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.