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Finding the Fourth Proportional to 142,169.54, 213,239.67 and 47,389.49

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Solution

The fourth proportional to 142,169.54, 213,239.67 and 47,389.49 is: 71,079.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,169.54 : 213,239.67 = 47,389.49 : x
  2. Step 2: Convert to fraction form
    142,169.54/213,239.67 = 47,389.49/x
  3. Step 3: Cross multiply
    142,169.54x = 213,239.67 × 47,389.49
  4. Step 4: Simplify right side
    142,169.54x = 10,105,318,142.87
  5. Step 5: Solve for x
    x = 10,105,318,142.87/142,169.54
  6. Step 6: Final answer
    x = 71,079.35

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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.