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Finding the Fourth Proportional to 70,891.80, 106,337.70 and 61,042.20

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Solution

The fourth proportional to 70,891.80, 106,337.70 and 61,042.20 is: 91,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,891.80 : 106,337.70 = 61,042.20 : x
  2. Step 2: Convert to fraction form
    70,891.80/106,337.70 = 61,042.20/x
  3. Step 3: Cross multiply
    70,891.80x = 106,337.70 × 61,042.20
  4. Step 4: Simplify right side
    70,891.80x = 6,491,087,150.94
  5. Step 5: Solve for x
    x = 6,491,087,150.94/70,891.80
  6. Step 6: Final answer
    x = 91,563.30

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1.5x scale

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.