Home / 78,387.40-117,500.58-30,983.24

Finding the Fourth Proportional to 78,387.40, 117,500.58 and 30,983.24

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Solution

The fourth proportional to 78,387.40, 117,500.58 and 30,983.24 is: 46,443.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,387.40 : 117,500.58 = 30,983.24 : x
  2. Step 2: Convert to fraction form
    78,387.40/117,500.58 = 30,983.24/x
  3. Step 3: Cross multiply
    78,387.40x = 117,500.58 × 30,983.24
  4. Step 4: Simplify right side
    78,387.40x = 3,640,548,670.28
  5. Step 5: Solve for x
    x = 3,640,548,670.28/78,387.40
  6. Step 6: Final answer
    x = 46,443.03

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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.