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Finding the Fourth Proportional to 69,920.73, 96,487.48 and 40,851.78

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Solution

The fourth proportional to 69,920.73, 96,487.48 and 40,851.78 is: 56,373.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,920.73 : 96,487.48 = 40,851.78 : x
  2. Step 2: Convert to fraction form
    69,920.73/96,487.48 = 40,851.78/x
  3. Step 3: Cross multiply
    69,920.73x = 96,487.48 × 40,851.78
  4. Step 4: Simplify right side
    69,920.73x = 3,941,685,305.71
  5. Step 5: Solve for x
    x = 3,941,685,305.71/69,920.73
  6. Step 6: Final answer
    x = 56,373.63

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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.