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Finding the Fourth Proportional to 143,589.81, 215,384.77 and 64,611.78

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Solution

The fourth proportional to 143,589.81, 215,384.77 and 64,611.78 is: 96,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,589.81 : 215,384.77 = 64,611.78 : x
  2. Step 2: Convert to fraction form
    143,589.81/215,384.77 = 64,611.78/x
  3. Step 3: Cross multiply
    143,589.81x = 215,384.77 × 64,611.78
  4. Step 4: Simplify right side
    143,589.81x = 13,916,392,647.66
  5. Step 5: Solve for x
    x = 13,916,392,647.66/143,589.81
  6. Step 6: Final answer
    x = 96,917.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.