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Finding the Fourth Proportional to 70,901.80, 106,352.70 and 61,052.20

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Solution

The fourth proportional to 70,901.80, 106,352.70 and 61,052.20 is: 91,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,901.80 : 106,352.70 = 61,052.20 : x
  2. Step 2: Convert to fraction form
    70,901.80/106,352.70 = 61,052.20/x
  3. Step 3: Cross multiply
    70,901.80x = 106,352.70 × 61,052.20
  4. Step 4: Simplify right side
    70,901.80x = 6,493,066,310.94
  5. Step 5: Solve for x
    x = 6,493,066,310.94/70,901.80
  6. Step 6: Final answer
    x = 91,578.30

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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.