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Finding the Fourth Proportional to 61,412.60, 91,900.20 and 42,604.40

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Solution

The fourth proportional to 61,412.60, 91,900.20 and 42,604.40 is: 63,754.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,412.60 : 91,900.20 = 42,604.40 : x
  2. Step 2: Convert to fraction form
    61,412.60/91,900.20 = 42,604.40/x
  3. Step 3: Cross multiply
    61,412.60x = 91,900.20 × 42,604.40
  4. Step 4: Simplify right side
    61,412.60x = 3,915,352,880.88
  5. Step 5: Solve for x
    x = 3,915,352,880.88/61,412.60
  6. Step 6: Final answer
    x = 63,754.88

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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.