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Finding the Fourth Proportional to 72,937.70, 109,163.55 and 52,890.20

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Solution

The fourth proportional to 72,937.70, 109,163.55 and 52,890.20 is: 79,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.70 : 109,163.55 = 52,890.20 : x
  2. Step 2: Convert to fraction form
    72,937.70/109,163.55 = 52,890.20/x
  3. Step 3: Cross multiply
    72,937.70x = 109,163.55 × 52,890.20
  4. Step 4: Simplify right side
    72,937.70x = 5,773,681,992.21
  5. Step 5: Solve for x
    x = 5,773,681,992.21/72,937.70
  6. Step 6: Final answer
    x = 79,159.09

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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.