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Finding the Fourth Proportional to 72,548.96, 100,117.56 and 40,717.86

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Solution

The fourth proportional to 72,548.96, 100,117.56 and 40,717.86 is: 56,190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,548.96 : 100,117.56 = 40,717.86 : x
  2. Step 2: Convert to fraction form
    72,548.96/100,117.56 = 40,717.86/x
  3. Step 3: Cross multiply
    72,548.96x = 100,117.56 × 40,717.86
  4. Step 4: Simplify right side
    72,548.96x = 4,076,572,393.73
  5. Step 5: Solve for x
    x = 4,076,572,393.73/72,548.96
  6. Step 6: Final answer
    x = 56,190.64

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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.