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Finding the Fourth Proportional to 78,281.66, 108,084.86 and 48,107.44

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Solution

The fourth proportional to 78,281.66, 108,084.86 and 48,107.44 is: 66,422.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.66 : 108,084.86 = 48,107.44 : x
  2. Step 2: Convert to fraction form
    78,281.66/108,084.86 = 48,107.44/x
  3. Step 3: Cross multiply
    78,281.66x = 108,084.86 × 48,107.44
  4. Step 4: Simplify right side
    78,281.66x = 5,199,685,917.36
  5. Step 5: Solve for x
    x = 5,199,685,917.36/78,281.66
  6. Step 6: Final answer
    x = 66,422.79

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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.