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Finding the Fourth Proportional to 72,195.81, 108,312.18 and 27,810.64

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Solution

The fourth proportional to 72,195.81, 108,312.18 and 27,810.64 is: 41,723.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.81 : 108,312.18 = 27,810.64 : x
  2. Step 2: Convert to fraction form
    72,195.81/108,312.18 = 27,810.64/x
  3. Step 3: Cross multiply
    72,195.81x = 108,312.18 × 27,810.64
  4. Step 4: Simplify right side
    72,195.81x = 3,012,231,045.60
  5. Step 5: Solve for x
    x = 3,012,231,045.60/72,195.81
  6. Step 6: Final answer
    x = 41,723.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.