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Finding the Fourth Proportional to 172,339.25, 258,554.43 and 78,823.13

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Solution

The fourth proportional to 172,339.25, 258,554.43 and 78,823.13 is: 118,255.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,339.25 : 258,554.43 = 78,823.13 : x
  2. Step 2: Convert to fraction form
    172,339.25/258,554.43 = 78,823.13/x
  3. Step 3: Cross multiply
    172,339.25x = 258,554.43 × 78,823.13
  4. Step 4: Simplify right side
    172,339.25x = 20,380,068,155.19
  5. Step 5: Solve for x
    x = 20,380,068,155.19/172,339.25
  6. Step 6: Final answer
    x = 118,255.53

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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.