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Finding the Fourth Proportional to 79,942, 119,913 and 21,574

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Solution

The fourth proportional to 79,942, 119,913 and 21,574 is: 32,361

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,942 : 119,913 = 21,574 : x
  2. Step 2: Convert to fraction form
    79,942/119,913 = 21,574/x
  3. Step 3: Cross multiply
    79,942x = 119,913 × 21,574
  4. Step 4: Simplify right side
    79,942x = 2,587,003,062
  5. Step 5: Solve for x
    x = 2,587,003,062/79,942
  6. Step 6: Final answer
    x = 32,361

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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.