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Finding the Fourth Proportional to 45,000.80, 67,436.40 and 20,020.40

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Solution

The fourth proportional to 45,000.80, 67,436.40 and 20,020.40 is: 30,001.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,000.80 : 67,436.40 = 20,020.40 : x
  2. Step 2: Convert to fraction form
    45,000.80/67,436.40 = 20,020.40/x
  3. Step 3: Cross multiply
    45,000.80x = 67,436.40 × 20,020.40
  4. Step 4: Simplify right side
    45,000.80x = 1,350,103,702.56
  5. Step 5: Solve for x
    x = 1,350,103,702.56/45,000.80
  6. Step 6: Final answer
    x = 30,001.77

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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.