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Finding the Fourth Proportional to 61,127.52, 91,661.04 and 21,678.72

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Solution

The fourth proportional to 61,127.52, 91,661.04 and 21,678.72 is: 32,507.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,127.52 : 91,661.04 = 21,678.72 : x
  2. Step 2: Convert to fraction form
    61,127.52/91,661.04 = 21,678.72/x
  3. Step 3: Cross multiply
    61,127.52x = 91,661.04 × 21,678.72
  4. Step 4: Simplify right side
    61,127.52x = 1,987,094,021.07
  5. Step 5: Solve for x
    x = 1,987,094,021.07/61,127.52
  6. Step 6: Final answer
    x = 32,507.36

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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.