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Finding the Fourth Proportional to 72,894.78, 100,560.41 and 42,661.38

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Solution

The fourth proportional to 72,894.78, 100,560.41 and 42,661.38 is: 58,852.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,894.78 : 100,560.41 = 42,661.38 : x
  2. Step 2: Convert to fraction form
    72,894.78/100,560.41 = 42,661.38/x
  3. Step 3: Cross multiply
    72,894.78x = 100,560.41 × 42,661.38
  4. Step 4: Simplify right side
    72,894.78x = 4,290,045,650.66
  5. Step 5: Solve for x
    x = 4,290,045,650.66/72,894.78
  6. Step 6: Final answer
    x = 58,852.58

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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.