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Finding the Fourth Proportional to 62,780.80, 94,171.20 and 21,227.80

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Solution

The fourth proportional to 62,780.80, 94,171.20 and 21,227.80 is: 31,841.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,780.80 : 94,171.20 = 21,227.80 : x
  2. Step 2: Convert to fraction form
    62,780.80/94,171.20 = 21,227.80/x
  3. Step 3: Cross multiply
    62,780.80x = 94,171.20 × 21,227.80
  4. Step 4: Simplify right side
    62,780.80x = 1,999,047,399.36
  5. Step 5: Solve for x
    x = 1,999,047,399.36/62,780.80
  6. Step 6: Final answer
    x = 31,841.70

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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.