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Finding the Fourth Proportional to 136,760.99, 205,215.15 and 66,640.30

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Solution

The fourth proportional to 136,760.99, 205,215.15 and 66,640.30 is: 99,996.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,760.99 : 205,215.15 = 66,640.30 : x
  2. Step 2: Convert to fraction form
    136,760.99/205,215.15 = 66,640.30/x
  3. Step 3: Cross multiply
    136,760.99x = 205,215.15 × 66,640.30
  4. Step 4: Simplify right side
    136,760.99x = 13,675,599,160.55
  5. Step 5: Solve for x
    x = 13,675,599,160.55/136,760.99
  6. Step 6: Final answer
    x = 99,996.35

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1.5x scale

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.