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Finding the Fourth Proportional to 139,759.70, 209,670.80 and 51,013.26

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Solution

The fourth proportional to 139,759.70, 209,670.80 and 51,013.26 is: 76,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,759.70 : 209,670.80 = 51,013.26 : x
  2. Step 2: Convert to fraction form
    139,759.70/209,670.80 = 51,013.26/x
  3. Step 3: Cross multiply
    139,759.70x = 209,670.80 × 51,013.26
  4. Step 4: Simplify right side
    139,759.70x = 10,695,990,779.74
  5. Step 5: Solve for x
    x = 10,695,990,779.74/139,759.70
  6. Step 6: Final answer
    x = 76,531.30

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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.