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Finding the Fourth Proportional to 118,138.37, 163,031.15 and 69,742.49

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Solution

The fourth proportional to 118,138.37, 163,031.15 and 69,742.49 is: 96,244.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,138.37 : 163,031.15 = 69,742.49 : x
  2. Step 2: Convert to fraction form
    118,138.37/163,031.15 = 69,742.49/x
  3. Step 3: Cross multiply
    118,138.37x = 163,031.15 × 69,742.49
  4. Step 4: Simplify right side
    118,138.37x = 11,370,198,348.56
  5. Step 5: Solve for x
    x = 11,370,198,348.56/118,138.37
  6. Step 6: Final answer
    x = 96,244.75

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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.