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Finding the Fourth Proportional to 140,681.80, 211,119.90 and 101,272.60

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Solution

The fourth proportional to 140,681.80, 211,119.90 and 101,272.60 is: 151,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,681.80 : 211,119.90 = 101,272.60 : x
  2. Step 2: Convert to fraction form
    140,681.80/211,119.90 = 101,272.60/x
  3. Step 3: Cross multiply
    140,681.80x = 211,119.90 × 101,272.60
  4. Step 4: Simplify right side
    140,681.80x = 21,380,661,184.74
  5. Step 5: Solve for x
    x = 21,380,661,184.74/140,681.80
  6. Step 6: Final answer
    x = 151,978.87

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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.