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Finding the Fourth Proportional to 72,541.91, 100,117.61 and 40,712.56

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Solution

The fourth proportional to 72,541.91, 100,117.61 and 40,712.56 is: 56,188.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,541.91 : 100,117.61 = 40,712.56 : x
  2. Step 2: Convert to fraction form
    72,541.91/100,117.61 = 40,712.56/x
  3. Step 3: Cross multiply
    72,541.91x = 100,117.61 × 40,712.56
  4. Step 4: Simplify right side
    72,541.91x = 4,076,044,204.18
  5. Step 5: Solve for x
    x = 4,076,044,204.18/72,541.91
  6. Step 6: Final answer
    x = 56,188.82

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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.