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Finding the Fourth Proportional to 56,669.76, 78,174.72 and 36,521.28

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Solution

The fourth proportional to 56,669.76, 78,174.72 and 36,521.28 is: 50,380.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,669.76 : 78,174.72 = 36,521.28 : x
  2. Step 2: Convert to fraction form
    56,669.76/78,174.72 = 36,521.28/x
  3. Step 3: Cross multiply
    56,669.76x = 78,174.72 × 36,521.28
  4. Step 4: Simplify right side
    56,669.76x = 2,855,040,838.04
  5. Step 5: Solve for x
    x = 2,855,040,838.04/56,669.76
  6. Step 6: Final answer
    x = 50,380.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.