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Finding the Fourth Proportional to 78,849.61, 118,230.66 and 26,230.39

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Solution

The fourth proportional to 78,849.61, 118,230.66 and 26,230.39 is: 39,331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,849.61 : 118,230.66 = 26,230.39 : x
  2. Step 2: Convert to fraction form
    78,849.61/118,230.66 = 26,230.39/x
  3. Step 3: Cross multiply
    78,849.61x = 118,230.66 × 26,230.39
  4. Step 4: Simplify right side
    78,849.61x = 3,101,236,321.76
  5. Step 5: Solve for x
    x = 3,101,236,321.76/78,849.61
  6. Step 6: Final answer
    x = 39,331.03

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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.