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Finding the Fourth Proportional to 72,988.88, 100,728.11 and 41,157.10

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Solution

The fourth proportional to 72,988.88, 100,728.11 and 41,157.10 is: 56,798.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.88 : 100,728.11 = 41,157.10 : x
  2. Step 2: Convert to fraction form
    72,988.88/100,728.11 = 41,157.10/x
  3. Step 3: Cross multiply
    72,988.88x = 100,728.11 × 41,157.10
  4. Step 4: Simplify right side
    72,988.88x = 4,145,676,326.78
  5. Step 5: Solve for x
    x = 4,145,676,326.78/72,988.88
  6. Step 6: Final answer
    x = 56,798.74

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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.