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Finding the Fourth Proportional to 171,399.69, 257,152.19 and 76,709.68

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Solution

The fourth proportional to 171,399.69, 257,152.19 and 76,709.68 is: 115,088.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,399.69 : 257,152.19 = 76,709.68 : x
  2. Step 2: Convert to fraction form
    171,399.69/257,152.19 = 76,709.68/x
  3. Step 3: Cross multiply
    171,399.69x = 257,152.19 × 76,709.68
  4. Step 4: Simplify right side
    171,399.69x = 19,726,061,179.77
  5. Step 5: Solve for x
    x = 19,726,061,179.77/171,399.69
  6. Step 6: Final answer
    x = 115,088.08

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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.