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Finding the Fourth Proportional to 139,234.30, 208,851.45 and 34,051.90

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Solution

The fourth proportional to 139,234.30, 208,851.45 and 34,051.90 is: 51,077.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,234.30 : 208,851.45 = 34,051.90 : x
  2. Step 2: Convert to fraction form
    139,234.30/208,851.45 = 34,051.90/x
  3. Step 3: Cross multiply
    139,234.30x = 208,851.45 × 34,051.90
  4. Step 4: Simplify right side
    139,234.30x = 7,111,788,690.26
  5. Step 5: Solve for x
    x = 7,111,788,690.26/139,234.30
  6. Step 6: Final answer
    x = 51,077.85

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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.