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Finding the Fourth Proportional to 66,678.26, 100,033.65 and 19,931.13

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Solution

The fourth proportional to 66,678.26, 100,033.65 and 19,931.13 is: 29,901.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,678.26 : 100,033.65 = 19,931.13 : x
  2. Step 2: Convert to fraction form
    66,678.26/100,033.65 = 19,931.13/x
  3. Step 3: Cross multiply
    66,678.26x = 100,033.65 × 19,931.13
  4. Step 4: Simplify right side
    66,678.26x = 1,993,783,682.52
  5. Step 5: Solve for x
    x = 1,993,783,682.52/66,678.26
  6. Step 6: Final answer
    x = 29,901.56

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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.