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Finding the Fourth Proportional to 111,987.39, 154,516.08 and 63,578.82

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Solution

The fourth proportional to 111,987.39, 154,516.08 and 63,578.82 is: 87,723.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.39 : 154,516.08 = 63,578.82 : x
  2. Step 2: Convert to fraction form
    111,987.39/154,516.08 = 63,578.82/x
  3. Step 3: Cross multiply
    111,987.39x = 154,516.08 × 63,578.82
  4. Step 4: Simplify right side
    111,987.39x = 9,823,950,037.43
  5. Step 5: Solve for x
    x = 9,823,950,037.43/111,987.39
  6. Step 6: Final answer
    x = 87,723.72

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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.