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Finding the Fourth Proportional to 78,297.90, 117,446.28 and 19,133.03

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Solution

The fourth proportional to 78,297.90, 117,446.28 and 19,133.03 is: 28,699.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,297.90 : 117,446.28 = 19,133.03 : x
  2. Step 2: Convert to fraction form
    78,297.90/117,446.28 = 19,133.03/x
  3. Step 3: Cross multiply
    78,297.90x = 117,446.28 × 19,133.03
  4. Step 4: Simplify right side
    78,297.90x = 2,247,102,611.40
  5. Step 5: Solve for x
    x = 2,247,102,611.40/78,297.90
  6. Step 6: Final answer
    x = 28,699.40

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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.