Home / 149,642.42-206,500.10-81,657.72

Finding the Fourth Proportional to 149,642.42, 206,500.10 and 81,657.72

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Solution

The fourth proportional to 149,642.42, 206,500.10 and 81,657.72 is: 112,684.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,642.42 : 206,500.10 = 81,657.72 : x
  2. Step 2: Convert to fraction form
    149,642.42/206,500.10 = 81,657.72/x
  3. Step 3: Cross multiply
    149,642.42x = 206,500.10 × 81,657.72
  4. Step 4: Simplify right side
    149,642.42x = 16,862,326,937.48
  5. Step 5: Solve for x
    x = 16,862,326,937.48/149,642.42
  6. Step 6: Final answer
    x = 112,684.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.