Home / 156,731.20-235,226.40-72,620.80

Finding the Fourth Proportional to 156,731.20, 235,226.40 and 72,620.80

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Solution

The fourth proportional to 156,731.20, 235,226.40 and 72,620.80 is: 108,991.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,731.20 : 235,226.40 = 72,620.80 : x
  2. Step 2: Convert to fraction form
    156,731.20/235,226.40 = 72,620.80/x
  3. Step 3: Cross multiply
    156,731.20x = 235,226.40 × 72,620.80
  4. Step 4: Simplify right side
    156,731.20x = 17,082,329,349.12
  5. Step 5: Solve for x
    x = 17,082,329,349.12/156,731.20
  6. Step 6: Final answer
    x = 108,991.25

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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.