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Finding the Fourth Proportional to 72,755.10, 108,895.86 and 40,681.26

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Solution

The fourth proportional to 72,755.10, 108,895.86 and 40,681.26 is: 60,889.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,755.10 : 108,895.86 = 40,681.26 : x
  2. Step 2: Convert to fraction form
    72,755.10/108,895.86 = 40,681.26/x
  3. Step 3: Cross multiply
    72,755.10x = 108,895.86 × 40,681.26
  4. Step 4: Simplify right side
    72,755.10x = 4,430,020,793.58
  5. Step 5: Solve for x
    x = 4,430,020,793.58/72,755.10
  6. Step 6: Final answer
    x = 60,889.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.