Home / 78,317.28-117,474.90-19,153.47

Finding the Fourth Proportional to 78,317.28, 117,474.90 and 19,153.47

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Solution

The fourth proportional to 78,317.28, 117,474.90 and 19,153.47 is: 28,729.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.28 : 117,474.90 = 19,153.47 : x
  2. Step 2: Convert to fraction form
    78,317.28/117,474.90 = 19,153.47/x
  3. Step 3: Cross multiply
    78,317.28x = 117,474.90 × 19,153.47
  4. Step 4: Simplify right side
    78,317.28x = 2,250,051,972.90
  5. Step 5: Solve for x
    x = 2,250,051,972.90/78,317.28
  6. Step 6: Final answer
    x = 28,729.96

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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.