Home / 78,598.11-117,857.12-38,619.75

Finding the Fourth Proportional to 78,598.11, 117,857.12 and 38,619.75

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Solution

The fourth proportional to 78,598.11, 117,857.12 and 38,619.75 is: 57,909.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,598.11 : 117,857.12 = 38,619.75 : x
  2. Step 2: Convert to fraction form
    78,598.11/117,857.12 = 38,619.75/x
  3. Step 3: Cross multiply
    78,598.11x = 117,857.12 × 38,619.75
  4. Step 4: Simplify right side
    78,598.11x = 4,551,612,317.02
  5. Step 5: Solve for x
    x = 4,551,612,317.02/78,598.11
  6. Step 6: Final answer
    x = 57,909.95

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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.