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Finding the Fourth Proportional to 140,403.87, 210,487.34 and 65,484.54

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Solution

The fourth proportional to 140,403.87, 210,487.34 and 65,484.54 is: 98,171.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,403.87 : 210,487.34 = 65,484.54 : x
  2. Step 2: Convert to fraction form
    140,403.87/210,487.34 = 65,484.54/x
  3. Step 3: Cross multiply
    140,403.87x = 210,487.34 × 65,484.54
  4. Step 4: Simplify right side
    140,403.87x = 13,783,666,308.30
  5. Step 5: Solve for x
    x = 13,783,666,308.30/140,403.87
  6. Step 6: Final answer
    x = 98,171.56

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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.