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Finding the Fourth Proportional to 252,090.72, 347,892.72 and 138,920.76

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Solution

The fourth proportional to 252,090.72, 347,892.72 and 138,920.76 is: 191,714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,090.72 : 347,892.72 = 138,920.76 : x
  2. Step 2: Convert to fraction form
    252,090.72/347,892.72 = 138,920.76/x
  3. Step 3: Cross multiply
    252,090.72x = 347,892.72 × 138,920.76
  4. Step 4: Simplify right side
    252,090.72x = 48,329,521,060.87
  5. Step 5: Solve for x
    x = 48,329,521,060.87/252,090.72
  6. Step 6: Final answer
    x = 191,714.80

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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.