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Finding the Fourth Proportional to 67,188.69, 100,815.84 and 42,240.49

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Solution

The fourth proportional to 67,188.69, 100,815.84 and 42,240.49 is: 63,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,188.69 : 100,815.84 = 42,240.49 : x
  2. Step 2: Convert to fraction form
    67,188.69/100,815.84 = 42,240.49/x
  3. Step 3: Cross multiply
    67,188.69x = 100,815.84 × 42,240.49
  4. Step 4: Simplify right side
    67,188.69x = 4,258,510,481.36
  5. Step 5: Solve for x
    x = 4,258,510,481.36/67,188.69
  6. Step 6: Final answer
    x = 63,381.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.