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Finding the Fourth Proportional to 81,800.62, 122,766.55 and 42,369.01

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Solution

The fourth proportional to 81,800.62, 122,766.55 and 42,369.01 is: 63,587.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,800.62 : 122,766.55 = 42,369.01 : x
  2. Step 2: Convert to fraction form
    81,800.62/122,766.55 = 42,369.01/x
  3. Step 3: Cross multiply
    81,800.62x = 122,766.55 × 42,369.01
  4. Step 4: Simplify right side
    81,800.62x = 5,201,497,184.62
  5. Step 5: Solve for x
    x = 5,201,497,184.62/81,800.62
  6. Step 6: Final answer
    x = 63,587.50

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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.