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Finding the Fourth Proportional to 100,690.90, 151,036.35 and 67,513.30

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Solution

The fourth proportional to 100,690.90, 151,036.35 and 67,513.30 is: 101,269.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,690.90 : 151,036.35 = 67,513.30 : x
  2. Step 2: Convert to fraction form
    100,690.90/151,036.35 = 67,513.30/x
  3. Step 3: Cross multiply
    100,690.90x = 151,036.35 × 67,513.30
  4. Step 4: Simplify right side
    100,690.90x = 10,196,962,408.46
  5. Step 5: Solve for x
    x = 10,196,962,408.46/100,690.90
  6. Step 6: Final answer
    x = 101,269.95

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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.