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Finding the Fourth Proportional to 172,394.10, 258,591.15 and 83,820.60

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Solution

The fourth proportional to 172,394.10, 258,591.15 and 83,820.60 is: 125,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,394.10 : 258,591.15 = 83,820.60 : x
  2. Step 2: Convert to fraction form
    172,394.10/258,591.15 = 83,820.60/x
  3. Step 3: Cross multiply
    172,394.10x = 258,591.15 × 83,820.60
  4. Step 4: Simplify right side
    172,394.10x = 21,675,265,347.69
  5. Step 5: Solve for x
    x = 21,675,265,347.69/172,394.10
  6. Step 6: Final answer
    x = 125,730.90

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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.