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Finding the Fourth Proportional to 252,886.12, 349,005.09 and 139,730.74

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Solution

The fourth proportional to 252,886.12, 349,005.09 and 139,730.74 is: 192,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,886.12 : 349,005.09 = 139,730.74 : x
  2. Step 2: Convert to fraction form
    252,886.12/349,005.09 = 139,730.74/x
  3. Step 3: Cross multiply
    252,886.12x = 349,005.09 × 139,730.74
  4. Step 4: Simplify right side
    252,886.12x = 48,766,739,489.47
  5. Step 5: Solve for x
    x = 48,766,739,489.47/252,886.12
  6. Step 6: Final answer
    x = 192,840.71

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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.