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Finding the Fourth Proportional to 78,396.75, 108,232.41 and 51,617.13

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Solution

The fourth proportional to 78,396.75, 108,232.41 and 51,617.13 is: 71,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,396.75 : 108,232.41 = 51,617.13 : x
  2. Step 2: Convert to fraction form
    78,396.75/108,232.41 = 51,617.13/x
  3. Step 3: Cross multiply
    78,396.75x = 108,232.41 × 51,617.13
  4. Step 4: Simplify right side
    78,396.75x = 5,586,646,377.18
  5. Step 5: Solve for x
    x = 5,586,646,377.18/78,396.75
  6. Step 6: Final answer
    x = 71,261.20

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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.