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Finding the Fourth Proportional to 140,958.40, 211,437.60 and 138,884.80

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Solution

The fourth proportional to 140,958.40, 211,437.60 and 138,884.80 is: 208,327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,958.40 : 211,437.60 = 138,884.80 : x
  2. Step 2: Convert to fraction form
    140,958.40/211,437.60 = 138,884.80/x
  3. Step 3: Cross multiply
    140,958.40x = 211,437.60 × 138,884.80
  4. Step 4: Simplify right side
    140,958.40x = 29,365,468,788.48
  5. Step 5: Solve for x
    x = 29,365,468,788.48/140,958.40
  6. Step 6: Final answer
    x = 208,327.20

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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.