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Finding the Fourth Proportional to 139,353.38, 209,034.41 and 66,307.32

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Solution

The fourth proportional to 139,353.38, 209,034.41 and 66,307.32 is: 99,463.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,353.38 : 209,034.41 = 66,307.32 : x
  2. Step 2: Convert to fraction form
    139,353.38/209,034.41 = 66,307.32/x
  3. Step 3: Cross multiply
    139,353.38x = 209,034.41 × 66,307.32
  4. Step 4: Simplify right side
    139,353.38x = 13,860,511,514.88
  5. Step 5: Solve for x
    x = 13,860,511,514.88/139,353.38
  6. Step 6: Final answer
    x = 99,463.05

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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.