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Finding the Fourth Proportional to 57,688.80, 86,533.20 and 32,719.20

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Solution

The fourth proportional to 57,688.80, 86,533.20 and 32,719.20 is: 49,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,688.80 : 86,533.20 = 32,719.20 : x
  2. Step 2: Convert to fraction form
    57,688.80/86,533.20 = 32,719.20/x
  3. Step 3: Cross multiply
    57,688.80x = 86,533.20 × 32,719.20
  4. Step 4: Simplify right side
    57,688.80x = 2,831,297,077.44
  5. Step 5: Solve for x
    x = 2,831,297,077.44/57,688.80
  6. Step 6: Final answer
    x = 49,078.80

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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.