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Finding the Fourth Proportional to 78,522.40, 117,740.40 and 34,141.60

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Solution

The fourth proportional to 78,522.40, 117,740.40 and 34,141.60 is: 51,193.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,522.40 : 117,740.40 = 34,141.60 : x
  2. Step 2: Convert to fraction form
    78,522.40/117,740.40 = 34,141.60/x
  3. Step 3: Cross multiply
    78,522.40x = 117,740.40 × 34,141.60
  4. Step 4: Simplify right side
    78,522.40x = 4,019,845,640.64
  5. Step 5: Solve for x
    x = 4,019,845,640.64/78,522.40
  6. Step 6: Final answer
    x = 51,193.62

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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.