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Finding the Fourth Proportional to 67,165.40, 100,661.70 and 40,842.20

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Solution

The fourth proportional to 67,165.40, 100,661.70 and 40,842.20 is: 61,210.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,165.40 : 100,661.70 = 40,842.20 : x
  2. Step 2: Convert to fraction form
    67,165.40/100,661.70 = 40,842.20/x
  3. Step 3: Cross multiply
    67,165.40x = 100,661.70 × 40,842.20
  4. Step 4: Simplify right side
    67,165.40x = 4,111,245,283.74
  5. Step 5: Solve for x
    x = 4,111,245,283.74/67,165.40
  6. Step 6: Final answer
    x = 61,210.76

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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.