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Finding the Fourth Proportional to 78,449.44, 117,673.15 and 19,285.62

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Solution

The fourth proportional to 78,449.44, 117,673.15 and 19,285.62 is: 28,928.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,449.44 : 117,673.15 = 19,285.62 : x
  2. Step 2: Convert to fraction form
    78,449.44/117,673.15 = 19,285.62/x
  3. Step 3: Cross multiply
    78,449.44x = 117,673.15 × 19,285.62
  4. Step 4: Simplify right side
    78,449.44x = 2,269,399,655.10
  5. Step 5: Solve for x
    x = 2,269,399,655.10/78,449.44
  6. Step 6: Final answer
    x = 28,928.18

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1.5x scale

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.