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Finding the Fourth Proportional to 136,690.10, 205,035.15 and 99,511.10

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Solution

The fourth proportional to 136,690.10, 205,035.15 and 99,511.10 is: 149,266.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,690.10 : 205,035.15 = 99,511.10 : x
  2. Step 2: Convert to fraction form
    136,690.10/205,035.15 = 99,511.10/x
  3. Step 3: Cross multiply
    136,690.10x = 205,035.15 × 99,511.10
  4. Step 4: Simplify right side
    136,690.10x = 20,403,273,315.17
  5. Step 5: Solve for x
    x = 20,403,273,315.17/136,690.10
  6. Step 6: Final answer
    x = 149,266.65

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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.