Home / 78,296.40-117,444.04-19,131.53

Finding the Fourth Proportional to 78,296.40, 117,444.04 and 19,131.53

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Solution

The fourth proportional to 78,296.40, 117,444.04 and 19,131.53 is: 28,697.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,296.40 : 117,444.04 = 19,131.53 : x
  2. Step 2: Convert to fraction form
    78,296.40/117,444.04 = 19,131.53/x
  3. Step 3: Cross multiply
    78,296.40x = 117,444.04 × 19,131.53
  4. Step 4: Simplify right side
    78,296.40x = 2,246,883,539.53
  5. Step 5: Solve for x
    x = 2,246,883,539.53/78,296.40
  6. Step 6: Final answer
    x = 28,697.15

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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.