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Finding the Fourth Proportional to 193,603.60, 290,419.80 and 68,928.40

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Solution

The fourth proportional to 193,603.60, 290,419.80 and 68,928.40 is: 103,397.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,603.60 : 290,419.80 = 68,928.40 : x
  2. Step 2: Convert to fraction form
    193,603.60/290,419.80 = 68,928.40/x
  3. Step 3: Cross multiply
    193,603.60x = 290,419.80 × 68,928.40
  4. Step 4: Simplify right side
    193,603.60x = 20,018,172,142.32
  5. Step 5: Solve for x
    x = 20,018,172,142.32/193,603.60
  6. Step 6: Final answer
    x = 103,397.73

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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.