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Finding the Fourth Proportional to 79,086.80, 118,631.55 and 29,141.20

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Solution

The fourth proportional to 79,086.80, 118,631.55 and 29,141.20 is: 43,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,086.80 : 118,631.55 = 29,141.20 : x
  2. Step 2: Convert to fraction form
    79,086.80/118,631.55 = 29,141.20/x
  3. Step 3: Cross multiply
    79,086.80x = 118,631.55 × 29,141.20
  4. Step 4: Simplify right side
    79,086.80x = 3,457,065,724.86
  5. Step 5: Solve for x
    x = 3,457,065,724.86/79,086.80
  6. Step 6: Final answer
    x = 43,712.30

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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.