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Finding the Fourth Proportional to 172,481.61, 258,634.76 and 78,907.17

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Solution

The fourth proportional to 172,481.61, 258,634.76 and 78,907.17 is: 118,320.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,481.61 : 258,634.76 = 78,907.17 : x
  2. Step 2: Convert to fraction form
    172,481.61/258,634.76 = 78,907.17/x
  3. Step 3: Cross multiply
    172,481.61x = 258,634.76 × 78,907.17
  4. Step 4: Simplify right side
    172,481.61x = 20,408,136,580.69
  5. Step 5: Solve for x
    x = 20,408,136,580.69/172,481.61
  6. Step 6: Final answer
    x = 118,320.65

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1.5x scale

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.