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Finding the Fourth Proportional to 251,679.84, 347,309.64 and 138,502.32

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Solution

The fourth proportional to 251,679.84, 347,309.64 and 138,502.32 is: 191,128.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,679.84 : 347,309.64 = 138,502.32 : x
  2. Step 2: Convert to fraction form
    251,679.84/347,309.64 = 138,502.32/x
  3. Step 3: Cross multiply
    251,679.84x = 347,309.64 × 138,502.32
  4. Step 4: Simplify right side
    251,679.84x = 48,103,190,898.36
  5. Step 5: Solve for x
    x = 48,103,190,898.36/251,679.84
  6. Step 6: Final answer
    x = 191,128.50

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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.