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Finding the Fourth Proportional to 221,570.82, 332,400.06 and 81,330.66

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Solution

The fourth proportional to 221,570.82, 332,400.06 and 81,330.66 is: 122,012.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,570.82 : 332,400.06 = 81,330.66 : x
  2. Step 2: Convert to fraction form
    221,570.82/332,400.06 = 81,330.66/x
  3. Step 3: Cross multiply
    221,570.82x = 332,400.06 × 81,330.66
  4. Step 4: Simplify right side
    221,570.82x = 27,034,316,263.84
  5. Step 5: Solve for x
    x = 27,034,316,263.84/221,570.82
  6. Step 6: Final answer
    x = 122,012.08

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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.