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Finding the Fourth Proportional to 140,321.42, 210,335.11 and 65,379.76

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Solution

The fourth proportional to 140,321.42, 210,335.11 and 65,379.76 is: 98,001.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,321.42 : 210,335.11 = 65,379.76 : x
  2. Step 2: Convert to fraction form
    140,321.42/210,335.11 = 65,379.76/x
  3. Step 3: Cross multiply
    140,321.42x = 210,335.11 × 65,379.76
  4. Step 4: Simplify right side
    140,321.42x = 13,751,658,716.46
  5. Step 5: Solve for x
    x = 13,751,658,716.46/140,321.42
  6. Step 6: Final answer
    x = 98,001.14

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1.5x scale

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.