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Finding the Fourth Proportional to 272,572.46, 408,829.93 and 72,913

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Solution

The fourth proportional to 272,572.46, 408,829.93 and 72,913 is: 109,361.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,572.46 : 408,829.93 = 72,913 : x
  2. Step 2: Convert to fraction form
    272,572.46/408,829.93 = 72,913/x
  3. Step 3: Cross multiply
    272,572.46x = 408,829.93 × 72,913
  4. Step 4: Simplify right side
    272,572.46x = 29,809,016,686.09
  5. Step 5: Solve for x
    x = 29,809,016,686.09/272,572.46
  6. Step 6: Final answer
    x = 109,361.81

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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.