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Finding the Fourth Proportional to 43,314.80, 64,978.74 and 18,354.95

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Solution

The fourth proportional to 43,314.80, 64,978.74 and 18,354.95 is: 27,535.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,314.80 : 64,978.74 = 18,354.95 : x
  2. Step 2: Convert to fraction form
    43,314.80/64,978.74 = 18,354.95/x
  3. Step 3: Cross multiply
    43,314.80x = 64,978.74 × 18,354.95
  4. Step 4: Simplify right side
    43,314.80x = 1,192,681,523.76
  5. Step 5: Solve for x
    x = 1,192,681,523.76/43,314.80
  6. Step 6: Final answer
    x = 27,535.20

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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.