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Finding the Fourth Proportional to 79,940, 119,910 and 21,572

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Solution

The fourth proportional to 79,940, 119,910 and 21,572 is: 32,358

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,940 : 119,910 = 21,572 : x
  2. Step 2: Convert to fraction form
    79,940/119,910 = 21,572/x
  3. Step 3: Cross multiply
    79,940x = 119,910 × 21,572
  4. Step 4: Simplify right side
    79,940x = 2,586,698,520
  5. Step 5: Solve for x
    x = 2,586,698,520/79,940
  6. Step 6: Final answer
    x = 32,358

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.