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Finding the Fourth Proportional to 72,326.61, 99,819.25 and 40,489.36

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Solution

The fourth proportional to 72,326.61, 99,819.25 and 40,489.36 is: 55,880.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,326.61 : 99,819.25 = 40,489.36 : x
  2. Step 2: Convert to fraction form
    72,326.61/99,819.25 = 40,489.36/x
  3. Step 3: Cross multiply
    72,326.61x = 99,819.25 × 40,489.36
  4. Step 4: Simplify right side
    72,326.61x = 4,041,617,548.18
  5. Step 5: Solve for x
    x = 4,041,617,548.18/72,326.61
  6. Step 6: Final answer
    x = 55,880.09

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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.