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Finding the Fourth Proportional to 111,813.76, 154,302.12 and 63,424.90

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Solution

The fourth proportional to 111,813.76, 154,302.12 and 63,424.90 is: 87,525.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,813.76 : 154,302.12 = 63,424.90 : x
  2. Step 2: Convert to fraction form
    111,813.76/154,302.12 = 63,424.90/x
  3. Step 3: Cross multiply
    111,813.76x = 154,302.12 × 63,424.90
  4. Step 4: Simplify right side
    111,813.76x = 9,786,596,530.79
  5. Step 5: Solve for x
    x = 9,786,596,530.79/111,813.76
  6. Step 6: Final answer
    x = 87,525.87

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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.