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Finding the Fourth Proportional to 279,090.86, 385,155.52 and 159,881.90

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Solution

The fourth proportional to 279,090.86, 385,155.52 and 159,881.90 is: 220,642.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,090.86 : 385,155.52 = 159,881.90 : x
  2. Step 2: Convert to fraction form
    279,090.86/385,155.52 = 159,881.90/x
  3. Step 3: Cross multiply
    279,090.86x = 385,155.52 × 159,881.90
  4. Step 4: Simplify right side
    279,090.86x = 61,579,394,007.61
  5. Step 5: Solve for x
    x = 61,579,394,007.61/279,090.86
  6. Step 6: Final answer
    x = 220,642.82

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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.