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Finding the Fourth Proportional to 78,519.50, 108,339.80 and 44,520.31

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Solution

The fourth proportional to 78,519.50, 108,339.80 and 44,520.31 is: 61,428.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.50 : 108,339.80 = 44,520.31 : x
  2. Step 2: Convert to fraction form
    78,519.50/108,339.80 = 44,520.31/x
  3. Step 3: Cross multiply
    78,519.50x = 108,339.80 × 44,520.31
  4. Step 4: Simplify right side
    78,519.50x = 4,823,321,394.16
  5. Step 5: Solve for x
    x = 4,823,321,394.16/78,519.50
  6. Step 6: Final answer
    x = 61,428.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.