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Finding the Fourth Proportional to 55,133.40, 82,721.70 and 21,847.80

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Solution

The fourth proportional to 55,133.40, 82,721.70 and 21,847.80 is: 32,780.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,133.40 : 82,721.70 = 21,847.80 : x
  2. Step 2: Convert to fraction form
    55,133.40/82,721.70 = 21,847.80/x
  3. Step 3: Cross multiply
    55,133.40x = 82,721.70 × 21,847.80
  4. Step 4: Simplify right side
    55,133.40x = 1,807,287,157.26
  5. Step 5: Solve for x
    x = 1,807,287,157.26/55,133.40
  6. Step 6: Final answer
    x = 32,780.26

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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.