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Finding the Fourth Proportional to 104,642.58, 156,960.35 and 45,478.25

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Solution

The fourth proportional to 104,642.58, 156,960.35 and 45,478.25 is: 68,215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,642.58 : 156,960.35 = 45,478.25 : x
  2. Step 2: Convert to fraction form
    104,642.58/156,960.35 = 45,478.25/x
  3. Step 3: Cross multiply
    104,642.58x = 156,960.35 × 45,478.25
  4. Step 4: Simplify right side
    104,642.58x = 7,138,282,202.40
  5. Step 5: Solve for x
    x = 7,138,282,202.40/104,642.58
  6. Step 6: Final answer
    x = 68,215.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.