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Finding the Fourth Proportional to 172,359.70, 258,539.55 and 47,700.70

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Solution

The fourth proportional to 172,359.70, 258,539.55 and 47,700.70 is: 71,551.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,359.70 : 258,539.55 = 47,700.70 : x
  2. Step 2: Convert to fraction form
    172,359.70/258,539.55 = 47,700.70/x
  3. Step 3: Cross multiply
    172,359.70x = 258,539.55 × 47,700.70
  4. Step 4: Simplify right side
    172,359.70x = 12,332,517,512.69
  5. Step 5: Solve for x
    x = 12,332,517,512.69/172,359.70
  6. Step 6: Final answer
    x = 71,551.05

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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.