Home / 78,198.12-117,209.16-38,783.52

Finding the Fourth Proportional to 78,198.12, 117,209.16 and 38,783.52

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Solution

The fourth proportional to 78,198.12, 117,209.16 and 38,783.52 is: 58,131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,198.12 : 117,209.16 = 38,783.52 : x
  2. Step 2: Convert to fraction form
    78,198.12/117,209.16 = 38,783.52/x
  3. Step 3: Cross multiply
    78,198.12x = 117,209.16 × 38,783.52
  4. Step 4: Simplify right side
    78,198.12x = 4,545,783,801.04
  5. Step 5: Solve for x
    x = 4,545,783,801.04/78,198.12
  6. Step 6: Final answer
    x = 58,131.63

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1.5x scale

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.