Home / 78,949.12-108,951.06-47,136.64

Finding the Fourth Proportional to 78,949.12, 108,951.06 and 47,136.64

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Solution

The fourth proportional to 78,949.12, 108,951.06 and 47,136.64 is: 65,049.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,949.12 : 108,951.06 = 47,136.64 : x
  2. Step 2: Convert to fraction form
    78,949.12/108,951.06 = 47,136.64/x
  3. Step 3: Cross multiply
    78,949.12x = 108,951.06 × 47,136.64
  4. Step 4: Simplify right side
    78,949.12x = 5,135,586,892.84
  5. Step 5: Solve for x
    x = 5,135,586,892.84/78,949.12
  6. Step 6: Final answer
    x = 65,049.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.