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Finding the Fourth Proportional to 78,409.43, 108,204.44 and 42,599.73

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Solution

The fourth proportional to 78,409.43, 108,204.44 and 42,599.73 is: 58,787.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,409.43 : 108,204.44 = 42,599.73 : x
  2. Step 2: Convert to fraction form
    78,409.43/108,204.44 = 42,599.73/x
  3. Step 3: Cross multiply
    78,409.43x = 108,204.44 × 42,599.73
  4. Step 4: Simplify right side
    78,409.43x = 4,609,479,715.80
  5. Step 5: Solve for x
    x = 4,609,479,715.80/78,409.43
  6. Step 6: Final answer
    x = 58,787.32

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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.