Home / 78,376.28-117,548.70-38,378.03

Finding the Fourth Proportional to 78,376.28, 117,548.70 and 38,378.03

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Solution

The fourth proportional to 78,376.28, 117,548.70 and 38,378.03 is: 57,559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,376.28 : 117,548.70 = 38,378.03 : x
  2. Step 2: Convert to fraction form
    78,376.28/117,548.70 = 38,378.03/x
  3. Step 3: Cross multiply
    78,376.28x = 117,548.70 × 38,378.03
  4. Step 4: Simplify right side
    78,376.28x = 4,511,287,535.06
  5. Step 5: Solve for x
    x = 4,511,287,535.06/78,376.28
  6. Step 6: Final answer
    x = 57,559.35

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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.