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Finding the Fourth Proportional to 72,096, 99,491.40 and 40,265.36

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Solution

The fourth proportional to 72,096, 99,491.40 and 40,265.36 is: 55,565.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,096 : 99,491.40 = 40,265.36 : x
  2. Step 2: Convert to fraction form
    72,096/99,491.40 = 40,265.36/x
  3. Step 3: Cross multiply
    72,096x = 99,491.40 × 40,265.36
  4. Step 4: Simplify right side
    72,096x = 4,006,057,037.90
  5. Step 5: Solve for x
    x = 4,006,057,037.90/72,096
  6. Step 6: Final answer
    x = 55,565.59

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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.