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Finding the Fourth Proportional to 55,125.40, 82,709.70 and 21,839.80

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Solution

The fourth proportional to 55,125.40, 82,709.70 and 21,839.80 is: 32,768.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,125.40 : 82,709.70 = 21,839.80 : x
  2. Step 2: Convert to fraction form
    55,125.40/82,709.70 = 21,839.80/x
  3. Step 3: Cross multiply
    55,125.40x = 82,709.70 × 21,839.80
  4. Step 4: Simplify right side
    55,125.40x = 1,806,363,306.06
  5. Step 5: Solve for x
    x = 1,806,363,306.06/55,125.40
  6. Step 6: Final answer
    x = 32,768.26

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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.