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Finding the Fourth Proportional to 139,234.40, 208,851.60 and 91,995.20

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Solution

The fourth proportional to 139,234.40, 208,851.60 and 91,995.20 is: 137,992.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,234.40 : 208,851.60 = 91,995.20 : x
  2. Step 2: Convert to fraction form
    139,234.40/208,851.60 = 91,995.20/x
  3. Step 3: Cross multiply
    139,234.40x = 208,851.60 × 91,995.20
  4. Step 4: Simplify right side
    139,234.40x = 19,213,344,712.32
  5. Step 5: Solve for x
    x = 19,213,344,712.32/139,234.40
  6. Step 6: Final answer
    x = 137,992.80

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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.