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Finding the Fourth Proportional to 172,305.98, 258,459.20 and 83,572.56

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Solution

The fourth proportional to 172,305.98, 258,459.20 and 83,572.56 is: 125,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,305.98 : 258,459.20 = 83,572.56 : x
  2. Step 2: Convert to fraction form
    172,305.98/258,459.20 = 83,572.56/x
  3. Step 3: Cross multiply
    172,305.98x = 258,459.20 × 83,572.56
  4. Step 4: Simplify right side
    172,305.98x = 21,600,097,365.18
  5. Step 5: Solve for x
    x = 21,600,097,365.18/172,305.98
  6. Step 6: Final answer
    x = 125,358.95

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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.