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Finding the Fourth Proportional to 49,751.80, 74,562.90 and 20,145.40

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Solution

The fourth proportional to 49,751.80, 74,562.90 and 20,145.40 is: 30,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,751.80 : 74,562.90 = 20,145.40 : x
  2. Step 2: Convert to fraction form
    49,751.80/74,562.90 = 20,145.40/x
  3. Step 3: Cross multiply
    49,751.80x = 74,562.90 × 20,145.40
  4. Step 4: Simplify right side
    49,751.80x = 1,502,099,445.66
  5. Step 5: Solve for x
    x = 1,502,099,445.66/49,751.80
  6. Step 6: Final answer
    x = 30,191.86

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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.