Home / 57,120.48-85,533.12-39,405.78

Finding the Fourth Proportional to 57,120.48, 85,533.12 and 39,405.78

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Solution

The fourth proportional to 57,120.48, 85,533.12 and 39,405.78 is: 59,006.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,120.48 : 85,533.12 = 39,405.78 : x
  2. Step 2: Convert to fraction form
    57,120.48/85,533.12 = 39,405.78/x
  3. Step 3: Cross multiply
    57,120.48x = 85,533.12 × 39,405.78
  4. Step 4: Simplify right side
    57,120.48x = 3,370,499,309.43
  5. Step 5: Solve for x
    x = 3,370,499,309.43/57,120.48
  6. Step 6: Final answer
    x = 59,006.84

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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.