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Finding the Fourth Proportional to 221,013.70, 331,333.13 and 78,816.17

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Solution

The fourth proportional to 221,013.70, 331,333.13 and 78,816.17 is: 118,157.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,013.70 : 331,333.13 = 78,816.17 : x
  2. Step 2: Convert to fraction form
    221,013.70/331,333.13 = 78,816.17/x
  3. Step 3: Cross multiply
    221,013.70x = 331,333.13 × 78,816.17
  4. Step 4: Simplify right side
    221,013.70x = 26,114,409,326.09
  5. Step 5: Solve for x
    x = 26,114,409,326.09/221,013.70
  6. Step 6: Final answer
    x = 118,157.42

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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.