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Finding the Fourth Proportional to 49,728.60, 74,592.90 and 20,147.40

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Solution

The fourth proportional to 49,728.60, 74,592.90 and 20,147.40 is: 30,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,728.60 : 74,592.90 = 20,147.40 : x
  2. Step 2: Convert to fraction form
    49,728.60/74,592.90 = 20,147.40/x
  3. Step 3: Cross multiply
    49,728.60x = 74,592.90 × 20,147.40
  4. Step 4: Simplify right side
    49,728.60x = 1,502,852,993.46
  5. Step 5: Solve for x
    x = 1,502,852,993.46/49,728.60
  6. Step 6: Final answer
    x = 30,221.10

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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.