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Finding the Fourth Proportional to 61,079.88, 91,624.28 and 18,954.60

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Solution

The fourth proportional to 61,079.88, 91,624.28 and 18,954.60 is: 28,433.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,079.88 : 91,624.28 = 18,954.60 : x
  2. Step 2: Convert to fraction form
    61,079.88/91,624.28 = 18,954.60/x
  3. Step 3: Cross multiply
    61,079.88x = 91,624.28 × 18,954.60
  4. Step 4: Simplify right side
    61,079.88x = 1,736,701,577.69
  5. Step 5: Solve for x
    x = 1,736,701,577.69/61,079.88
  6. Step 6: Final answer
    x = 28,433.28

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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.