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Finding the Fourth Proportional to 221,079.54, 305,003.16 and 136,048.98

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Solution

The fourth proportional to 221,079.54, 305,003.16 and 136,048.98 is: 187,694.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,079.54 : 305,003.16 = 136,048.98 : x
  2. Step 2: Convert to fraction form
    221,079.54/305,003.16 = 136,048.98/x
  3. Step 3: Cross multiply
    221,079.54x = 305,003.16 × 136,048.98
  4. Step 4: Simplify right side
    221,079.54x = 41,495,368,814.78
  5. Step 5: Solve for x
    x = 41,495,368,814.78/221,079.54
  6. Step 6: Final answer
    x = 187,694.30

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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.