Home / 420,637.20-631,056.24-140,156.88

Finding the Fourth Proportional to 420,637.20, 631,056.24 and 140,156.88

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Solution

The fourth proportional to 420,637.20, 631,056.24 and 140,156.88 is: 210,268.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,637.20 : 631,056.24 = 140,156.88 : x
  2. Step 2: Convert to fraction form
    420,637.20/631,056.24 = 140,156.88/x
  3. Step 3: Cross multiply
    420,637.20x = 631,056.24 × 140,156.88
  4. Step 4: Simplify right side
    420,637.20x = 88,446,873,702.93
  5. Step 5: Solve for x
    x = 88,446,873,702.93/420,637.20
  6. Step 6: Final answer
    x = 210,268.79

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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.