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Finding the Fourth Proportional to 61,989.67, 92,913.22 and 28,639.68

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Solution

The fourth proportional to 61,989.67, 92,913.22 and 28,639.68 is: 42,926.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,989.67 : 92,913.22 = 28,639.68 : x
  2. Step 2: Convert to fraction form
    61,989.67/92,913.22 = 28,639.68/x
  3. Step 3: Cross multiply
    61,989.67x = 92,913.22 × 28,639.68
  4. Step 4: Simplify right side
    61,989.67x = 2,661,004,888.57
  5. Step 5: Solve for x
    x = 2,661,004,888.57/61,989.67
  6. Step 6: Final answer
    x = 42,926.59

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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.