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Finding the Fourth Proportional to 172,474.13, 258,711.20 and 47,815.13

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Solution

The fourth proportional to 172,474.13, 258,711.20 and 47,815.13 is: 71,722.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,474.13 : 258,711.20 = 47,815.13 : x
  2. Step 2: Convert to fraction form
    172,474.13/258,711.20 = 47,815.13/x
  3. Step 3: Cross multiply
    172,474.13x = 258,711.20 × 47,815.13
  4. Step 4: Simplify right side
    172,474.13x = 12,370,308,127.82
  5. Step 5: Solve for x
    x = 12,370,308,127.82/172,474.13
  6. Step 6: Final answer
    x = 71,722.69

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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.