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Finding the Fourth Proportional to 159,605.64, 220,255.00 and 87,985.44

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Solution

The fourth proportional to 159,605.64, 220,255.00 and 87,985.44 is: 121,419.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,605.64 : 220,255.00 = 87,985.44 : x
  2. Step 2: Convert to fraction form
    159,605.64/220,255.00 = 87,985.44/x
  3. Step 3: Cross multiply
    159,605.64x = 220,255.00 × 87,985.44
  4. Step 4: Simplify right side
    159,605.64x = 19,379,232,867.24
  5. Step 5: Solve for x
    x = 19,379,232,867.24/159,605.64
  6. Step 6: Final answer
    x = 121,419.47

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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.