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Finding the Fourth Proportional to 56,816.98, 78,407.98 and 31,324.28

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Solution

The fourth proportional to 56,816.98, 78,407.98 and 31,324.28 is: 43,227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,816.98 : 78,407.98 = 31,324.28 : x
  2. Step 2: Convert to fraction form
    56,816.98/78,407.98 = 31,324.28/x
  3. Step 3: Cross multiply
    56,816.98x = 78,407.98 × 31,324.28
  4. Step 4: Simplify right side
    56,816.98x = 2,456,073,519.75
  5. Step 5: Solve for x
    x = 2,456,073,519.75/56,816.98
  6. Step 6: Final answer
    x = 43,227.81

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1.5x scale

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.