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Finding the Fourth Proportional to 140,057.60, 209,911.20 and 69,956.48

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Solution

The fourth proportional to 140,057.60, 209,911.20 and 69,956.48 is: 104,847.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,057.60 : 209,911.20 = 69,956.48 : x
  2. Step 2: Convert to fraction form
    140,057.60/209,911.20 = 69,956.48/x
  3. Step 3: Cross multiply
    140,057.60x = 209,911.20 × 69,956.48
  4. Step 4: Simplify right side
    140,057.60x = 14,684,648,664.58
  5. Step 5: Solve for x
    x = 14,684,648,664.58/140,057.60
  6. Step 6: Final answer
    x = 104,847.21

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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.