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Finding the Fourth Proportional to 72,344.07, 99,895.68 and 54,407.84

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Solution

The fourth proportional to 72,344.07, 99,895.68 and 54,407.84 is: 75,128.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,344.07 : 99,895.68 = 54,407.84 : x
  2. Step 2: Convert to fraction form
    72,344.07/99,895.68 = 54,407.84/x
  3. Step 3: Cross multiply
    72,344.07x = 99,895.68 × 54,407.84
  4. Step 4: Simplify right side
    72,344.07x = 5,435,107,674.65
  5. Step 5: Solve for x
    x = 5,435,107,674.65/72,344.07
  6. Step 6: Final answer
    x = 75,128.59

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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.