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Finding the Fourth Proportional to 72,648.40, 108,972.60 and 60,984.40

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Solution

The fourth proportional to 72,648.40, 108,972.60 and 60,984.40 is: 91,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,648.40 : 108,972.60 = 60,984.40 : x
  2. Step 2: Convert to fraction form
    72,648.40/108,972.60 = 60,984.40/x
  3. Step 3: Cross multiply
    72,648.40x = 108,972.60 × 60,984.40
  4. Step 4: Simplify right side
    72,648.40x = 6,645,628,627.44
  5. Step 5: Solve for x
    x = 6,645,628,627.44/72,648.40
  6. Step 6: Final answer
    x = 91,476.60

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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.