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Finding the Fourth Proportional to 140,447.30, 210,698.96 and 40,608.70

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Solution

The fourth proportional to 140,447.30, 210,698.96 and 40,608.70 is: 60,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,447.30 : 210,698.96 = 40,608.70 : x
  2. Step 2: Convert to fraction form
    140,447.30/210,698.96 = 40,608.70/x
  3. Step 3: Cross multiply
    140,447.30x = 210,698.96 × 40,608.70
  4. Step 4: Simplify right side
    140,447.30x = 8,556,210,127.16
  5. Step 5: Solve for x
    x = 8,556,210,127.16/140,447.30
  6. Step 6: Final answer
    x = 60,921.15

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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.