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Finding the Fourth Proportional to 104,643.80, 156,962.18 and 45,479.46

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Solution

The fourth proportional to 104,643.80, 156,962.18 and 45,479.46 is: 68,217.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,643.80 : 156,962.18 = 45,479.46 : x
  2. Step 2: Convert to fraction form
    104,643.80/156,962.18 = 45,479.46/x
  3. Step 3: Cross multiply
    104,643.80x = 156,962.18 × 45,479.46
  4. Step 4: Simplify right side
    104,643.80x = 7,138,555,300.52
  5. Step 5: Solve for x
    x = 7,138,555,300.52/104,643.80
  6. Step 6: Final answer
    x = 68,217.66

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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.