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Finding the Fourth Proportional to 56,995.72, 78,653.90 and 31,845.22

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Solution

The fourth proportional to 56,995.72, 78,653.90 and 31,845.22 is: 43,946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,995.72 : 78,653.90 = 31,845.22 : x
  2. Step 2: Convert to fraction form
    56,995.72/78,653.90 = 31,845.22/x
  3. Step 3: Cross multiply
    56,995.72x = 78,653.90 × 31,845.22
  4. Step 4: Simplify right side
    56,995.72x = 2,504,750,632.34
  5. Step 5: Solve for x
    x = 2,504,750,632.34/56,995.72
  6. Step 6: Final answer
    x = 43,946.30

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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.