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Finding the Fourth Proportional to 251,676.18, 347,313.18 and 138,498.93

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Solution

The fourth proportional to 251,676.18, 347,313.18 and 138,498.93 is: 191,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,676.18 : 347,313.18 = 138,498.93 : x
  2. Step 2: Convert to fraction form
    251,676.18/347,313.18 = 138,498.93/x
  3. Step 3: Cross multiply
    251,676.18x = 347,313.18 × 138,498.93
  4. Step 4: Simplify right side
    251,676.18x = 48,102,502,274.75
  5. Step 5: Solve for x
    x = 48,102,502,274.75/251,676.18
  6. Step 6: Final answer
    x = 191,128.55

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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.