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Finding the Fourth Proportional to 52,981.66, 79,471.41 and 21,390.88

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Solution

The fourth proportional to 52,981.66, 79,471.41 and 21,390.88 is: 32,085.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,981.66 : 79,471.41 = 21,390.88 : x
  2. Step 2: Convert to fraction form
    52,981.66/79,471.41 = 21,390.88/x
  3. Step 3: Cross multiply
    52,981.66x = 79,471.41 × 21,390.88
  4. Step 4: Simplify right side
    52,981.66x = 1,699,963,394.74
  5. Step 5: Solve for x
    x = 1,699,963,394.74/52,981.66
  6. Step 6: Final answer
    x = 32,085.88

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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.