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Finding the Fourth Proportional to 53,461.80, 80,211.02 and 20,191.45

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Solution

The fourth proportional to 53,461.80, 80,211.02 and 20,191.45 is: 30,294.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,461.80 : 80,211.02 = 20,191.45 : x
  2. Step 2: Convert to fraction form
    53,461.80/80,211.02 = 20,191.45/x
  3. Step 3: Cross multiply
    53,461.80x = 80,211.02 × 20,191.45
  4. Step 4: Simplify right side
    53,461.80x = 1,619,576,799.78
  5. Step 5: Solve for x
    x = 1,619,576,799.78/53,461.80
  6. Step 6: Final answer
    x = 30,294.09

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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.