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Finding the Fourth Proportional to 251,990.02, 347,750.40 and 138,812.86

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Solution

The fourth proportional to 251,990.02, 347,750.40 and 138,812.86 is: 191,564.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,990.02 : 347,750.40 = 138,812.86 : x
  2. Step 2: Convert to fraction form
    251,990.02/347,750.40 = 138,812.86/x
  3. Step 3: Cross multiply
    251,990.02x = 347,750.40 × 138,812.86
  4. Step 4: Simplify right side
    251,990.02x = 48,272,227,590.14
  5. Step 5: Solve for x
    x = 48,272,227,590.14/251,990.02
  6. Step 6: Final answer
    x = 191,564.05

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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.