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Finding the Fourth Proportional to 149,215.34, 205,910.87 and 81,230.91

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Solution

The fourth proportional to 149,215.34, 205,910.87 and 81,230.91 is: 112,095.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,215.34 : 205,910.87 = 81,230.91 : x
  2. Step 2: Convert to fraction form
    149,215.34/205,910.87 = 81,230.91/x
  3. Step 3: Cross multiply
    149,215.34x = 205,910.87 × 81,230.91
  4. Step 4: Simplify right side
    149,215.34x = 16,726,327,552.07
  5. Step 5: Solve for x
    x = 16,726,327,552.07/149,215.34
  6. Step 6: Final answer
    x = 112,095.23

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1.5x scale

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.