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Finding the Fourth Proportional to 56,559.40, 84,836.40 and 19,115.80

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Solution

The fourth proportional to 56,559.40, 84,836.40 and 19,115.80 is: 28,672.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,559.40 : 84,836.40 = 19,115.80 : x
  2. Step 2: Convert to fraction form
    56,559.40/84,836.40 = 19,115.80/x
  3. Step 3: Cross multiply
    56,559.40x = 84,836.40 × 19,115.80
  4. Step 4: Simplify right side
    56,559.40x = 1,621,715,655.12
  5. Step 5: Solve for x
    x = 1,621,715,655.12/56,559.40
  6. Step 6: Final answer
    x = 28,672.79

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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.