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Finding the Fourth Proportional to 251,696.61, 347,348.30 and 136,976.31

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Solution

The fourth proportional to 251,696.61, 347,348.30 and 136,976.31 is: 189,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,696.61 : 347,348.30 = 136,976.31 : x
  2. Step 2: Convert to fraction form
    251,696.61/347,348.30 = 136,976.31/x
  3. Step 3: Cross multiply
    251,696.61x = 347,348.30 × 136,976.31
  4. Step 4: Simplify right side
    251,696.61x = 47,578,487,733.89
  5. Step 5: Solve for x
    x = 47,578,487,733.89/251,696.61
  6. Step 6: Final answer
    x = 189,031.10

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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.