Home / 72,280.89-108,429.44-19,690.83

Finding the Fourth Proportional to 72,280.89, 108,429.44 and 19,690.83

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Solution

The fourth proportional to 72,280.89, 108,429.44 and 19,690.83 is: 29,538.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,280.89 : 108,429.44 = 19,690.83 : x
  2. Step 2: Convert to fraction form
    72,280.89/108,429.44 = 19,690.83/x
  3. Step 3: Cross multiply
    72,280.89x = 108,429.44 × 19,690.83
  4. Step 4: Simplify right side
    72,280.89x = 2,135,065,571.58
  5. Step 5: Solve for x
    x = 2,135,065,571.58/72,280.89
  6. Step 6: Final answer
    x = 29,538.45

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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.