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Finding the Fourth Proportional to 111,505.80, 167,258.70 and 90,510.60

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Solution

The fourth proportional to 111,505.80, 167,258.70 and 90,510.60 is: 135,765.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,505.80 : 167,258.70 = 90,510.60 : x
  2. Step 2: Convert to fraction form
    111,505.80/167,258.70 = 90,510.60/x
  3. Step 3: Cross multiply
    111,505.80x = 167,258.70 × 90,510.60
  4. Step 4: Simplify right side
    111,505.80x = 15,138,685,292.22
  5. Step 5: Solve for x
    x = 15,138,685,292.22/111,505.80
  6. Step 6: Final answer
    x = 135,765.90

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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.