Home / 56,721.27-78,272.31-31,222.68

Finding the Fourth Proportional to 56,721.27, 78,272.31 and 31,222.68

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Solution

The fourth proportional to 56,721.27, 78,272.31 and 31,222.68 is: 43,085.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.27 : 78,272.31 = 31,222.68 : x
  2. Step 2: Convert to fraction form
    56,721.27/78,272.31 = 31,222.68/x
  3. Step 3: Cross multiply
    56,721.27x = 78,272.31 × 31,222.68
  4. Step 4: Simplify right side
    56,721.27x = 2,443,871,287.99
  5. Step 5: Solve for x
    x = 2,443,871,287.99/56,721.27
  6. Step 6: Final answer
    x = 43,085.62

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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.