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Finding the Fourth Proportional to 118,251.57, 163,364.88 and 77,512.39

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Solution

The fourth proportional to 118,251.57, 163,364.88 and 77,512.39 is: 107,083.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,251.57 : 163,364.88 = 77,512.39 : x
  2. Step 2: Convert to fraction form
    118,251.57/163,364.88 = 77,512.39/x
  3. Step 3: Cross multiply
    118,251.57x = 163,364.88 × 77,512.39
  4. Step 4: Simplify right side
    118,251.57x = 12,662,801,903.30
  5. Step 5: Solve for x
    x = 12,662,801,903.30/118,251.57
  6. Step 6: Final answer
    x = 107,083.59

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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.