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Finding the Fourth Proportional to 426,600, 639,848.88 and 111,081.60

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Solution

The fourth proportional to 426,600, 639,848.88 and 111,081.60 is: 166,609.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,600 : 639,848.88 = 111,081.60 : x
  2. Step 2: Convert to fraction form
    426,600/639,848.88 = 111,081.60/x
  3. Step 3: Cross multiply
    426,600x = 639,848.88 × 111,081.60
  4. Step 4: Simplify right side
    426,600x = 71,075,437,348.61
  5. Step 5: Solve for x
    x = 71,075,437,348.61/426,600
  6. Step 6: Final answer
    x = 166,609.09

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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.