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Finding the Fourth Proportional to 251,675.86, 347,312.74 and 138,498.61

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Solution

The fourth proportional to 251,675.86, 347,312.74 and 138,498.61 is: 191,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,675.86 : 347,312.74 = 138,498.61 : x
  2. Step 2: Convert to fraction form
    251,675.86/347,312.74 = 138,498.61/x
  3. Step 3: Cross multiply
    251,675.86x = 347,312.74 × 138,498.61
  4. Step 4: Simplify right side
    251,675.86x = 48,102,331,908.57
  5. Step 5: Solve for x
    x = 48,102,331,908.57/251,675.86
  6. Step 6: Final answer
    x = 191,128.11

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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.