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Finding the Fourth Proportional to 98,997, 136,677.60 and 68,772.12

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Solution

The fourth proportional to 98,997, 136,677.60 and 68,772.12 is: 94,948.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,997 : 136,677.60 = 68,772.12 : x
  2. Step 2: Convert to fraction form
    98,997/136,677.60 = 68,772.12/x
  3. Step 3: Cross multiply
    98,997x = 136,677.60 × 68,772.12
  4. Step 4: Simplify right side
    98,997x = 9,399,608,308.51
  5. Step 5: Solve for x
    x = 9,399,608,308.51/98,997
  6. Step 6: Final answer
    x = 94,948.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.