Home / 142,105.18-213,157.80-72,004.54

Finding the Fourth Proportional to 142,105.18, 213,157.80 and 72,004.54

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Solution

The fourth proportional to 142,105.18, 213,157.80 and 72,004.54 is: 108,006.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,105.18 : 213,157.80 = 72,004.54 : x
  2. Step 2: Convert to fraction form
    142,105.18/213,157.80 = 72,004.54/x
  3. Step 3: Cross multiply
    142,105.18x = 213,157.80 × 72,004.54
  4. Step 4: Simplify right side
    142,105.18x = 15,348,329,336.41
  5. Step 5: Solve for x
    x = 15,348,329,336.41/142,105.18
  6. Step 6: Final answer
    x = 108,006.83

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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.