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Finding the Fourth Proportional to 61,287.90, 91,920.88 and 16,309.50

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Solution

The fourth proportional to 61,287.90, 91,920.88 and 16,309.50 is: 24,461.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,287.90 : 91,920.88 = 16,309.50 : x
  2. Step 2: Convert to fraction form
    61,287.90/91,920.88 = 16,309.50/x
  3. Step 3: Cross multiply
    61,287.90x = 91,920.88 × 16,309.50
  4. Step 4: Simplify right side
    61,287.90x = 1,499,183,592.36
  5. Step 5: Solve for x
    x = 1,499,183,592.36/61,287.90
  6. Step 6: Final answer
    x = 24,461.33

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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.