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Finding the Fourth Proportional to 118,396.40, 163,338.65 and 87,425.85

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Solution

The fourth proportional to 118,396.40, 163,338.65 and 87,425.85 is: 120,611.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,396.40 : 163,338.65 = 87,425.85 : x
  2. Step 2: Convert to fraction form
    118,396.40/163,338.65 = 87,425.85/x
  3. Step 3: Cross multiply
    118,396.40x = 163,338.65 × 87,425.85
  4. Step 4: Simplify right side
    118,396.40x = 14,280,019,876.97
  5. Step 5: Solve for x
    x = 14,280,019,876.97/118,396.40
  6. Step 6: Final answer
    x = 120,611.95

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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.