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Finding the Fourth Proportional to 78,883.60, 118,195.80 and 65,664.40

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Solution

The fourth proportional to 78,883.60, 118,195.80 and 65,664.40 is: 98,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,883.60 : 118,195.80 = 65,664.40 : x
  2. Step 2: Convert to fraction form
    78,883.60/118,195.80 = 65,664.40/x
  3. Step 3: Cross multiply
    78,883.60x = 118,195.80 × 65,664.40
  4. Step 4: Simplify right side
    78,883.60x = 7,761,256,289.52
  5. Step 5: Solve for x
    x = 7,761,256,289.52/78,883.60
  6. Step 6: Final answer
    x = 98,388.72

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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.