Home / 72,984.10-109,479.39-28,606.90

Finding the Fourth Proportional to 72,984.10, 109,479.39 and 28,606.90

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Solution

The fourth proportional to 72,984.10, 109,479.39 and 28,606.90 is: 42,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984.10 : 109,479.39 = 28,606.90 : x
  2. Step 2: Convert to fraction form
    72,984.10/109,479.39 = 28,606.90/x
  3. Step 3: Cross multiply
    72,984.10x = 109,479.39 × 28,606.90
  4. Step 4: Simplify right side
    72,984.10x = 3,131,865,961.79
  5. Step 5: Solve for x
    x = 3,131,865,961.79/72,984.10
  6. Step 6: Final answer
    x = 42,911.62

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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.