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Finding the Fourth Proportional to 143,399.72, 215,094.72 and 54,650

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Solution

The fourth proportional to 143,399.72, 215,094.72 and 54,650 is: 81,973.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,399.72 : 215,094.72 = 54,650 : x
  2. Step 2: Convert to fraction form
    143,399.72/215,094.72 = 54,650/x
  3. Step 3: Cross multiply
    143,399.72x = 215,094.72 × 54,650
  4. Step 4: Simplify right side
    143,399.72x = 11,754,926,448
  5. Step 5: Solve for x
    x = 11,754,926,448/143,399.72
  6. Step 6: Final answer
    x = 81,973.15

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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.