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Finding the Fourth Proportional to 78,968.48, 118,485.60 and 34,572.40

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Solution

The fourth proportional to 78,968.48, 118,485.60 and 34,572.40 is: 51,872.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,968.48 : 118,485.60 = 34,572.40 : x
  2. Step 2: Convert to fraction form
    78,968.48/118,485.60 = 34,572.40/x
  3. Step 3: Cross multiply
    78,968.48x = 118,485.60 × 34,572.40
  4. Step 4: Simplify right side
    78,968.48x = 4,096,331,557.44
  5. Step 5: Solve for x
    x = 4,096,331,557.44/78,968.48
  6. Step 6: Final answer
    x = 51,872.99

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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.