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Finding the Fourth Proportional to 72,986.61, 100,718.46 and 41,158.47

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Solution

The fourth proportional to 72,986.61, 100,718.46 and 41,158.47 is: 56,796.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,986.61 : 100,718.46 = 41,158.47 : x
  2. Step 2: Convert to fraction form
    72,986.61/100,718.46 = 41,158.47/x
  3. Step 3: Cross multiply
    72,986.61x = 100,718.46 × 41,158.47
  4. Step 4: Simplify right side
    72,986.61x = 4,145,417,714.36
  5. Step 5: Solve for x
    x = 4,145,417,714.36/72,986.61
  6. Step 6: Final answer
    x = 56,796.96

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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.