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Finding the Fourth Proportional to 279,986.80, 419,981.87 and 69,624.74

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Solution

The fourth proportional to 279,986.80, 419,981.87 and 69,624.74 is: 104,437.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,986.80 : 419,981.87 = 69,624.74 : x
  2. Step 2: Convert to fraction form
    279,986.80/419,981.87 = 69,624.74/x
  3. Step 3: Cross multiply
    279,986.80x = 419,981.87 × 69,624.74
  4. Step 4: Simplify right side
    279,986.80x = 29,241,127,365.08
  5. Step 5: Solve for x
    x = 29,241,127,365.08/279,986.80
  6. Step 6: Final answer
    x = 104,437.52

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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.