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Finding the Fourth Proportional to 71,965.24, 99,274.86 and 42,879.16

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Solution

The fourth proportional to 71,965.24, 99,274.86 and 42,879.16 is: 59,151.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,965.24 : 99,274.86 = 42,879.16 : x
  2. Step 2: Convert to fraction form
    71,965.24/99,274.86 = 42,879.16/x
  3. Step 3: Cross multiply
    71,965.24x = 99,274.86 × 42,879.16
  4. Step 4: Simplify right side
    71,965.24x = 4,256,822,605.92
  5. Step 5: Solve for x
    x = 4,256,822,605.92/71,965.24
  6. Step 6: Final answer
    x = 59,151.09

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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.