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Finding the Fourth Proportional to 98,998, 136,678.98 and 68,773.12

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Solution

The fourth proportional to 98,998, 136,678.98 and 68,773.12 is: 94,949.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,998 : 136,678.98 = 68,773.12 : x
  2. Step 2: Convert to fraction form
    98,998/136,678.98 = 68,773.12/x
  3. Step 3: Cross multiply
    98,998x = 136,678.98 × 68,773.12
  4. Step 4: Simplify right side
    98,998x = 9,399,839,893.02
  5. Step 5: Solve for x
    x = 9,399,839,893.02/98,998
  6. Step 6: Final answer
    x = 94,949.80

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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.