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Finding the Fourth Proportional to 426,665.68, 640,035.78 and 111,122.08

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Solution

The fourth proportional to 426,665.68, 640,035.78 and 111,122.08 is: 166,692.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,665.68 : 640,035.78 = 111,122.08 : x
  2. Step 2: Convert to fraction form
    426,665.68/640,035.78 = 111,122.08/x
  3. Step 3: Cross multiply
    426,665.68x = 640,035.78 × 111,122.08
  4. Step 4: Simplify right side
    426,665.68x = 71,122,107,148.02
  5. Step 5: Solve for x
    x = 71,122,107,148.02/426,665.68
  6. Step 6: Final answer
    x = 166,692.82

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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.