Home / 111,453.29-153,865.20-85,903.66

Finding the Fourth Proportional to 111,453.29, 153,865.20 and 85,903.66

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Solution

The fourth proportional to 111,453.29, 153,865.20 and 85,903.66 is: 118,593.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,453.29 : 153,865.20 = 85,903.66 : x
  2. Step 2: Convert to fraction form
    111,453.29/153,865.20 = 85,903.66/x
  3. Step 3: Cross multiply
    111,453.29x = 153,865.20 × 85,903.66
  4. Step 4: Simplify right side
    111,453.29x = 13,217,583,826.63
  5. Step 5: Solve for x
    x = 13,217,583,826.63/111,453.29
  6. Step 6: Final answer
    x = 118,593.03

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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.