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Finding the Fourth Proportional to 79,858.80, 119,687.40 and 40,426.80

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Solution

The fourth proportional to 79,858.80, 119,687.40 and 40,426.80 is: 60,589.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,858.80 : 119,687.40 = 40,426.80 : x
  2. Step 2: Convert to fraction form
    79,858.80/119,687.40 = 40,426.80/x
  3. Step 3: Cross multiply
    79,858.80x = 119,687.40 × 40,426.80
  4. Step 4: Simplify right side
    79,858.80x = 4,838,578,582.32
  5. Step 5: Solve for x
    x = 4,838,578,582.32/79,858.80
  6. Step 6: Final answer
    x = 60,589.17

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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.