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Finding the Fourth Proportional to 78,399.20, 117,598.80 and 19,234.10

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Solution

The fourth proportional to 78,399.20, 117,598.80 and 19,234.10 is: 28,851.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,399.20 : 117,598.80 = 19,234.10 : x
  2. Step 2: Convert to fraction form
    78,399.20/117,598.80 = 19,234.10/x
  3. Step 3: Cross multiply
    78,399.20x = 117,598.80 × 19,234.10
  4. Step 4: Simplify right side
    78,399.20x = 2,261,907,079.08
  5. Step 5: Solve for x
    x = 2,261,907,079.08/78,399.20
  6. Step 6: Final answer
    x = 28,851.15

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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.