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Finding the Fourth Proportional to 143,583.71, 215,390.29 and 54,911.79

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Solution

The fourth proportional to 143,583.71, 215,390.29 and 54,911.79 is: 82,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,583.71 : 215,390.29 = 54,911.79 : x
  2. Step 2: Convert to fraction form
    143,583.71/215,390.29 = 54,911.79/x
  3. Step 3: Cross multiply
    143,583.71x = 215,390.29 × 54,911.79
  4. Step 4: Simplify right side
    143,583.71x = 11,827,466,338.20
  5. Step 5: Solve for x
    x = 11,827,466,338.20/143,583.71
  6. Step 6: Final answer
    x = 82,373.32

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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.