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Finding the Fourth Proportional to 140,456.60, 210,704.90 and 45,656.31

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Solution

The fourth proportional to 140,456.60, 210,704.90 and 45,656.31 is: 68,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,456.60 : 210,704.90 = 45,656.31 : x
  2. Step 2: Convert to fraction form
    140,456.60/210,704.90 = 45,656.31/x
  3. Step 3: Cross multiply
    140,456.60x = 210,704.90 × 45,656.31
  4. Step 4: Simplify right side
    140,456.60x = 9,620,008,004.64
  5. Step 5: Solve for x
    x = 9,620,008,004.64/140,456.60
  6. Step 6: Final answer
    x = 68,490.96

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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.