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Finding the Fourth Proportional to 67,247.40, 100,983.56 and 42,005.65

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Solution

The fourth proportional to 67,247.40, 100,983.56 and 42,005.65 is: 63,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,247.40 : 100,983.56 = 42,005.65 : x
  2. Step 2: Convert to fraction form
    67,247.40/100,983.56 = 42,005.65/x
  3. Step 3: Cross multiply
    67,247.40x = 100,983.56 × 42,005.65
  4. Step 4: Simplify right side
    67,247.40x = 4,241,880,077.11
  5. Step 5: Solve for x
    x = 4,241,880,077.11/67,247.40
  6. Step 6: Final answer
    x = 63,078.72

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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.