Home / 56,979.30-78,636.03-31,487.91

Finding the Fourth Proportional to 56,979.30, 78,636.03 and 31,487.91

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Solution

The fourth proportional to 56,979.30, 78,636.03 and 31,487.91 is: 43,455.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,979.30 : 78,636.03 = 31,487.91 : x
  2. Step 2: Convert to fraction form
    56,979.30/78,636.03 = 31,487.91/x
  3. Step 3: Cross multiply
    56,979.30x = 78,636.03 × 31,487.91
  4. Step 4: Simplify right side
    56,979.30x = 2,476,084,235.40
  5. Step 5: Solve for x
    x = 2,476,084,235.40/56,979.30
  6. Step 6: Final answer
    x = 43,455.86

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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.