Home / 52,305.12-78,412.32-21,120.12

Finding the Fourth Proportional to 52,305.12, 78,412.32 and 21,120.12

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Solution

The fourth proportional to 52,305.12, 78,412.32 and 21,120.12 is: 31,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,305.12 : 78,412.32 = 21,120.12 : x
  2. Step 2: Convert to fraction form
    52,305.12/78,412.32 = 21,120.12/x
  3. Step 3: Cross multiply
    52,305.12x = 78,412.32 × 21,120.12
  4. Step 4: Simplify right side
    52,305.12x = 1,656,077,607.88
  5. Step 5: Solve for x
    x = 1,656,077,607.88/52,305.12
  6. Step 6: Final answer
    x = 31,661.86

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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.