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Finding the Fourth Proportional to 60,681.69, 91,004.06 and 21,231.45

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Solution

The fourth proportional to 60,681.69, 91,004.06 and 21,231.45 is: 31,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,681.69 : 91,004.06 = 21,231.45 : x
  2. Step 2: Convert to fraction form
    60,681.69/91,004.06 = 21,231.45/x
  3. Step 3: Cross multiply
    60,681.69x = 91,004.06 × 21,231.45
  4. Step 4: Simplify right side
    60,681.69x = 1,932,148,043.53
  5. Step 5: Solve for x
    x = 1,932,148,043.53/60,681.69
  6. Step 6: Final answer
    x = 31,840.71

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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.