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Finding the Fourth Proportional to 72,641.82, 100,234.80 and 40,804.62

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Solution

The fourth proportional to 72,641.82, 100,234.80 and 40,804.62 is: 56,304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,641.82 : 100,234.80 = 40,804.62 : x
  2. Step 2: Convert to fraction form
    72,641.82/100,234.80 = 40,804.62/x
  3. Step 3: Cross multiply
    72,641.82x = 100,234.80 × 40,804.62
  4. Step 4: Simplify right side
    72,641.82x = 4,090,042,924.78
  5. Step 5: Solve for x
    x = 4,090,042,924.78/72,641.82
  6. Step 6: Final answer
    x = 56,304.25

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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.