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Finding the Fourth Proportional to 78,824.70, 108,778.39 and 43,015.50

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Solution

The fourth proportional to 78,824.70, 108,778.39 and 43,015.50 is: 59,361.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,824.70 : 108,778.39 = 43,015.50 : x
  2. Step 2: Convert to fraction form
    78,824.70/108,778.39 = 43,015.50/x
  3. Step 3: Cross multiply
    78,824.70x = 108,778.39 × 43,015.50
  4. Step 4: Simplify right side
    78,824.70x = 4,679,156,727.51
  5. Step 5: Solve for x
    x = 4,679,156,727.51/78,824.70
  6. Step 6: Final answer
    x = 59,361.55

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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.