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Finding the Fourth Proportional to 55,430.80, 83,121.90 and 22,139.80

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Solution

The fourth proportional to 55,430.80, 83,121.90 and 22,139.80 is: 33,199.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,430.80 : 83,121.90 = 22,139.80 : x
  2. Step 2: Convert to fraction form
    55,430.80/83,121.90 = 22,139.80/x
  3. Step 3: Cross multiply
    55,430.80x = 83,121.90 × 22,139.80
  4. Step 4: Simplify right side
    55,430.80x = 1,840,302,241.62
  5. Step 5: Solve for x
    x = 1,840,302,241.62/55,430.80
  6. Step 6: Final answer
    x = 33,199.99

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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.