Home / 90,629.12-135,940.98-53,160.42

Finding the Fourth Proportional to 90,629.12, 135,940.98 and 53,160.42

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Solution

The fourth proportional to 90,629.12, 135,940.98 and 53,160.42 is: 79,739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,629.12 : 135,940.98 = 53,160.42 : x
  2. Step 2: Convert to fraction form
    90,629.12/135,940.98 = 53,160.42/x
  3. Step 3: Cross multiply
    90,629.12x = 135,940.98 × 53,160.42
  4. Step 4: Simplify right side
    90,629.12x = 7,226,679,592.01
  5. Step 5: Solve for x
    x = 7,226,679,592.01/90,629.12
  6. Step 6: Final answer
    x = 79,739.05

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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.