Home / 140,218.40-210,327.60-87,687.20

Finding the Fourth Proportional to 140,218.40, 210,327.60 and 87,687.20

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Solution

The fourth proportional to 140,218.40, 210,327.60 and 87,687.20 is: 131,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,218.40 : 210,327.60 = 87,687.20 : x
  2. Step 2: Convert to fraction form
    140,218.40/210,327.60 = 87,687.20/x
  3. Step 3: Cross multiply
    140,218.40x = 210,327.60 × 87,687.20
  4. Step 4: Simplify right side
    140,218.40x = 18,443,038,326.72
  5. Step 5: Solve for x
    x = 18,443,038,326.72/140,218.40
  6. Step 6: Final answer
    x = 131,530.80

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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.