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Finding the Fourth Proportional to 72,879.78, 100,599.26 and 42,674.82

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Solution

The fourth proportional to 72,879.78, 100,599.26 and 42,674.82 is: 58,905.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,879.78 : 100,599.26 = 42,674.82 : x
  2. Step 2: Convert to fraction form
    72,879.78/100,599.26 = 42,674.82/x
  3. Step 3: Cross multiply
    72,879.78x = 100,599.26 × 42,674.82
  4. Step 4: Simplify right side
    72,879.78x = 4,293,055,099.26
  5. Step 5: Solve for x
    x = 4,293,055,099.26/72,879.78
  6. Step 6: Final answer
    x = 58,905.98

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1.5x scale

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.