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Finding the Fourth Proportional to 56,663.92, 78,228.24 and 43,128.88

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Solution

The fourth proportional to 56,663.92, 78,228.24 and 43,128.88 is: 59,542.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,663.92 : 78,228.24 = 43,128.88 : x
  2. Step 2: Convert to fraction form
    56,663.92/78,228.24 = 43,128.88/x
  3. Step 3: Cross multiply
    56,663.92x = 78,228.24 × 43,128.88
  4. Step 4: Simplify right side
    56,663.92x = 3,373,896,375.57
  5. Step 5: Solve for x
    x = 3,373,896,375.57/56,663.92
  6. Step 6: Final answer
    x = 59,542.23

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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.