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Finding the Fourth Proportional to 61,108.51, 91,803.11 and 43,138.06

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Solution

The fourth proportional to 61,108.51, 91,803.11 and 43,138.06 is: 64,806.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,108.51 : 91,803.11 = 43,138.06 : x
  2. Step 2: Convert to fraction form
    61,108.51/91,803.11 = 43,138.06/x
  3. Step 3: Cross multiply
    61,108.51x = 91,803.11 × 43,138.06
  4. Step 4: Simplify right side
    61,108.51x = 3,960,208,067.37
  5. Step 5: Solve for x
    x = 3,960,208,067.37/61,108.51
  6. Step 6: Final answer
    x = 64,806.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.