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Finding the Fourth Proportional to 143,898.91, 215,725.28 and 55,216.06

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Solution

The fourth proportional to 143,898.91, 215,725.28 and 55,216.06 is: 82,776.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,898.91 : 215,725.28 = 55,216.06 : x
  2. Step 2: Convert to fraction form
    143,898.91/215,725.28 = 55,216.06/x
  3. Step 3: Cross multiply
    143,898.91x = 215,725.28 × 55,216.06
  4. Step 4: Simplify right side
    143,898.91x = 11,911,500,681.35
  5. Step 5: Solve for x
    x = 11,911,500,681.35/143,898.91
  6. Step 6: Final answer
    x = 82,776.86

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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.