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Finding the Fourth Proportional to 172,511.47, 258,679.73 and 78,937.03

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Solution

The fourth proportional to 172,511.47, 258,679.73 and 78,937.03 is: 118,365.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,511.47 : 258,679.73 = 78,937.03 : x
  2. Step 2: Convert to fraction form
    172,511.47/258,679.73 = 78,937.03/x
  3. Step 3: Cross multiply
    172,511.47x = 258,679.73 × 78,937.03
  4. Step 4: Simplify right side
    172,511.47x = 20,419,409,684.07
  5. Step 5: Solve for x
    x = 20,419,409,684.07/172,511.47
  6. Step 6: Final answer
    x = 118,365.52

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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.