Home / 72,916.20-109,155.60-43,318.80

Finding the Fourth Proportional to 72,916.20, 109,155.60 and 43,318.80

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Solution

The fourth proportional to 72,916.20, 109,155.60 and 43,318.80 is: 64,848.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,916.20 : 109,155.60 = 43,318.80 : x
  2. Step 2: Convert to fraction form
    72,916.20/109,155.60 = 43,318.80/x
  3. Step 3: Cross multiply
    72,916.20x = 109,155.60 × 43,318.80
  4. Step 4: Simplify right side
    72,916.20x = 4,728,489,605.28
  5. Step 5: Solve for x
    x = 4,728,489,605.28/72,916.20
  6. Step 6: Final answer
    x = 64,848.27

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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.