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Finding the Fourth Proportional to 140,812.80, 211,215.51 and 47,318.52

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Solution

The fourth proportional to 140,812.80, 211,215.51 and 47,318.52 is: 70,976.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,812.80 : 211,215.51 = 47,318.52 : x
  2. Step 2: Convert to fraction form
    140,812.80/211,215.51 = 47,318.52/x
  3. Step 3: Cross multiply
    140,812.80x = 211,215.51 × 47,318.52
  4. Step 4: Simplify right side
    140,812.80x = 9,994,405,334.25
  5. Step 5: Solve for x
    x = 9,994,405,334.25/140,812.80
  6. Step 6: Final answer
    x = 70,976.54

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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.