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Finding the Fourth Proportional to 61,065.92, 91,611.92 and 18,945.08

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Solution

The fourth proportional to 61,065.92, 91,611.92 and 18,945.08 is: 28,421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,065.92 : 91,611.92 = 18,945.08 : x
  2. Step 2: Convert to fraction form
    61,065.92/91,611.92 = 18,945.08/x
  3. Step 3: Cross multiply
    61,065.92x = 91,611.92 × 18,945.08
  4. Step 4: Simplify right side
    61,065.92x = 1,735,595,153.35
  5. Step 5: Solve for x
    x = 1,735,595,153.35/61,065.92
  6. Step 6: Final answer
    x = 28,421.67

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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.