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Finding the Fourth Proportional to 149,990.82, 206,989.55 and 101,607.55

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Solution

The fourth proportional to 149,990.82, 206,989.55 and 101,607.55 is: 140,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,990.82 : 206,989.55 = 101,607.55 : x
  2. Step 2: Convert to fraction form
    149,990.82/206,989.55 = 101,607.55/x
  3. Step 3: Cross multiply
    149,990.82x = 206,989.55 × 101,607.55
  4. Step 4: Simplify right side
    149,990.82x = 21,031,700,025.59
  5. Step 5: Solve for x
    x = 21,031,700,025.59/149,990.82
  6. Step 6: Final answer
    x = 140,219.91

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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.