Home / 111,518.90-153,826.08-66,164.78

Finding the Fourth Proportional to 111,518.90, 153,826.08 and 66,164.78

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Solution

The fourth proportional to 111,518.90, 153,826.08 and 66,164.78 is: 91,265.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,518.90 : 153,826.08 = 66,164.78 : x
  2. Step 2: Convert to fraction form
    111,518.90/153,826.08 = 66,164.78/x
  3. Step 3: Cross multiply
    111,518.90x = 153,826.08 × 66,164.78
  4. Step 4: Simplify right side
    111,518.90x = 10,177,868,741.46
  5. Step 5: Solve for x
    x = 10,177,868,741.46/111,518.90
  6. Step 6: Final answer
    x = 91,265.86

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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.