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Finding the Fourth Proportional to 98,988, 136,604.16 and 54,276

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Solution

The fourth proportional to 98,988, 136,604.16 and 54,276 is: 74,901.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,988 : 136,604.16 = 54,276 : x
  2. Step 2: Convert to fraction form
    98,988/136,604.16 = 54,276/x
  3. Step 3: Cross multiply
    98,988x = 136,604.16 × 54,276
  4. Step 4: Simplify right side
    98,988x = 7,414,327,388.16
  5. Step 5: Solve for x
    x = 7,414,327,388.16/98,988
  6. Step 6: Final answer
    x = 74,901.27

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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.