Home / 66,339.36-91,542.96-42,138.48

Finding the Fourth Proportional to 66,339.36, 91,542.96 and 42,138.48

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Solution

The fourth proportional to 66,339.36, 91,542.96 and 42,138.48 is: 58,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,339.36 : 91,542.96 = 42,138.48 : x
  2. Step 2: Convert to fraction form
    66,339.36/91,542.96 = 42,138.48/x
  3. Step 3: Cross multiply
    66,339.36x = 91,542.96 × 42,138.48
  4. Step 4: Simplify right side
    66,339.36x = 3,857,481,189.10
  5. Step 5: Solve for x
    x = 3,857,481,189.10/66,339.36
  6. Step 6: Final answer
    x = 58,147.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.