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Finding the Fourth Proportional to 74,379.70, 111,569.53 and 18,975.70

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Solution

The fourth proportional to 74,379.70, 111,569.53 and 18,975.70 is: 28,463.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,379.70 : 111,569.53 = 18,975.70 : x
  2. Step 2: Convert to fraction form
    74,379.70/111,569.53 = 18,975.70/x
  3. Step 3: Cross multiply
    74,379.70x = 111,569.53 × 18,975.70
  4. Step 4: Simplify right side
    74,379.70x = 2,117,109,930.42
  5. Step 5: Solve for x
    x = 2,117,109,930.42/74,379.70
  6. Step 6: Final answer
    x = 28,463.54

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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.