Home / 78,126.28-117,165.48-28,200.28

Finding the Fourth Proportional to 78,126.28, 117,165.48 and 28,200.28

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Solution

The fourth proportional to 78,126.28, 117,165.48 and 28,200.28 is: 42,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.28 : 117,165.48 = 28,200.28 : x
  2. Step 2: Convert to fraction form
    78,126.28/117,165.48 = 28,200.28/x
  3. Step 3: Cross multiply
    78,126.28x = 117,165.48 × 28,200.28
  4. Step 4: Simplify right side
    78,126.28x = 3,304,099,342.33
  5. Step 5: Solve for x
    x = 3,304,099,342.33/78,126.28
  6. Step 6: Final answer
    x = 42,291.78

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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.