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Finding the Fourth Proportional to 60,604.40, 90,890.40 and 21,157.40

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Solution

The fourth proportional to 60,604.40, 90,890.40 and 21,157.40 is: 31,730.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,604.40 : 90,890.40 = 21,157.40 : x
  2. Step 2: Convert to fraction form
    60,604.40/90,890.40 = 21,157.40/x
  3. Step 3: Cross multiply
    60,604.40x = 90,890.40 × 21,157.40
  4. Step 4: Simplify right side
    60,604.40x = 1,923,004,548.96
  5. Step 5: Solve for x
    x = 1,923,004,548.96/60,604.40
  6. Step 6: Final answer
    x = 31,730.44

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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.