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Finding the Fourth Proportional to 98,799, 136,342.62 and 54,087

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Solution

The fourth proportional to 98,799, 136,342.62 and 54,087 is: 74,640.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,799 : 136,342.62 = 54,087 : x
  2. Step 2: Convert to fraction form
    98,799/136,342.62 = 54,087/x
  3. Step 3: Cross multiply
    98,799x = 136,342.62 × 54,087
  4. Step 4: Simplify right side
    98,799x = 7,374,363,287.94
  5. Step 5: Solve for x
    x = 7,374,363,287.94/98,799
  6. Step 6: Final answer
    x = 74,640.06

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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.