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Finding the Fourth Proportional to 143,355.78, 215,036.62 and 52,168.06

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Solution

The fourth proportional to 143,355.78, 215,036.62 and 52,168.06 is: 78,253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,355.78 : 215,036.62 = 52,168.06 : x
  2. Step 2: Convert to fraction form
    143,355.78/215,036.62 = 52,168.06/x
  3. Step 3: Cross multiply
    143,355.78x = 215,036.62 × 52,168.06
  4. Step 4: Simplify right side
    143,355.78x = 11,218,043,294.36
  5. Step 5: Solve for x
    x = 11,218,043,294.36/143,355.78
  6. Step 6: Final answer
    x = 78,253.16

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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.