Home / 56,391.78-77,817.29-31,239.46

Finding the Fourth Proportional to 56,391.78, 77,817.29 and 31,239.46

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Solution

The fourth proportional to 56,391.78, 77,817.29 and 31,239.46 is: 43,108.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,391.78 : 77,817.29 = 31,239.46 : x
  2. Step 2: Convert to fraction form
    56,391.78/77,817.29 = 31,239.46/x
  3. Step 3: Cross multiply
    56,391.78x = 77,817.29 × 31,239.46
  4. Step 4: Simplify right side
    56,391.78x = 2,430,970,118.26
  5. Step 5: Solve for x
    x = 2,430,970,118.26/56,391.78
  6. Step 6: Final answer
    x = 43,108.59

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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.