Home / 431,142.90-646,811.55-131,637.30

Finding the Fourth Proportional to 431,142.90, 646,811.55 and 131,637.30

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Solution

The fourth proportional to 431,142.90, 646,811.55 and 131,637.30 is: 197,485.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,142.90 : 646,811.55 = 131,637.30 : x
  2. Step 2: Convert to fraction form
    431,142.90/646,811.55 = 131,637.30/x
  3. Step 3: Cross multiply
    431,142.90x = 646,811.55 × 131,637.30
  4. Step 4: Simplify right side
    431,142.90x = 85,144,526,050.82
  5. Step 5: Solve for x
    x = 85,144,526,050.82/431,142.90
  6. Step 6: Final answer
    x = 197,485.63

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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.