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Finding the Fourth Proportional to 99,015, 136,640.70 and 54,303

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Solution

The fourth proportional to 99,015, 136,640.70 and 54,303 is: 74,938.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,015 : 136,640.70 = 54,303 : x
  2. Step 2: Convert to fraction form
    99,015/136,640.70 = 54,303/x
  3. Step 3: Cross multiply
    99,015x = 136,640.70 × 54,303
  4. Step 4: Simplify right side
    99,015x = 7,419,999,932.10
  5. Step 5: Solve for x
    x = 7,419,999,932.10/99,015
  6. Step 6: Final answer
    x = 74,938.14

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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.