Home / 56,721.51-78,272.72-31,222.90

Finding the Fourth Proportional to 56,721.51, 78,272.72 and 31,222.90

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Solution

The fourth proportional to 56,721.51, 78,272.72 and 31,222.90 is: 43,085.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.51 : 78,272.72 = 31,222.90 : x
  2. Step 2: Convert to fraction form
    56,721.51/78,272.72 = 31,222.90/x
  3. Step 3: Cross multiply
    56,721.51x = 78,272.72 × 31,222.90
  4. Step 4: Simplify right side
    56,721.51x = 2,443,901,236.08
  5. Step 5: Solve for x
    x = 2,443,901,236.08/56,721.51
  6. Step 6: Final answer
    x = 43,085.97

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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.