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Finding the Fourth Proportional to 153,704.07, 212,111.79 and 84,791.97

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Solution

The fourth proportional to 153,704.07, 212,111.79 and 84,791.97 is: 117,013.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,704.07 : 212,111.79 = 84,791.97 : x
  2. Step 2: Convert to fraction form
    153,704.07/212,111.79 = 84,791.97/x
  3. Step 3: Cross multiply
    153,704.07x = 212,111.79 × 84,791.97
  4. Step 4: Simplify right side
    153,704.07x = 17,985,376,534.33
  5. Step 5: Solve for x
    x = 17,985,376,534.33/153,704.07
  6. Step 6: Final answer
    x = 117,013.01

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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.