Home / 111,531.69-153,913.92-66,218.73

Finding the Fourth Proportional to 111,531.69, 153,913.92 and 66,218.73

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Solution

The fourth proportional to 111,531.69, 153,913.92 and 66,218.73 is: 91,381.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,531.69 : 153,913.92 = 66,218.73 : x
  2. Step 2: Convert to fraction form
    111,531.69/153,913.92 = 66,218.73/x
  3. Step 3: Cross multiply
    111,531.69x = 153,913.92 × 66,218.73
  4. Step 4: Simplify right side
    111,531.69x = 10,191,984,311.72
  5. Step 5: Solve for x
    x = 10,191,984,311.72/111,531.69
  6. Step 6: Final answer
    x = 91,381.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.