Home / 111,326.34-166,378.29-81,403.59

Finding the Fourth Proportional to 111,326.34, 166,378.29 and 81,403.59

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Solution

The fourth proportional to 111,326.34, 166,378.29 and 81,403.59 is: 121,658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,326.34 : 166,378.29 = 81,403.59 : x
  2. Step 2: Convert to fraction form
    111,326.34/166,378.29 = 81,403.59/x
  3. Step 3: Cross multiply
    111,326.34x = 166,378.29 × 81,403.59
  4. Step 4: Simplify right side
    111,326.34x = 13,543,790,104.06
  5. Step 5: Solve for x
    x = 13,543,790,104.06/111,326.34
  6. Step 6: Final answer
    x = 121,658.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.