Home / 78,132.72-117,199.08-18,967.44

Finding the Fourth Proportional to 78,132.72, 117,199.08 and 18,967.44

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Solution

The fourth proportional to 78,132.72, 117,199.08 and 18,967.44 is: 28,451.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.72 : 117,199.08 = 18,967.44 : x
  2. Step 2: Convert to fraction form
    78,132.72/117,199.08 = 18,967.44/x
  3. Step 3: Cross multiply
    78,132.72x = 117,199.08 × 18,967.44
  4. Step 4: Simplify right side
    78,132.72x = 2,222,966,517.96
  5. Step 5: Solve for x
    x = 2,222,966,517.96/78,132.72
  6. Step 6: Final answer
    x = 28,451.16

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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.