Home / 111,320.80-166,981.20-90,325.60

Finding the Fourth Proportional to 111,320.80, 166,981.20 and 90,325.60

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Solution

The fourth proportional to 111,320.80, 166,981.20 and 90,325.60 is: 135,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,320.80 : 166,981.20 = 90,325.60 : x
  2. Step 2: Convert to fraction form
    111,320.80/166,981.20 = 90,325.60/x
  3. Step 3: Cross multiply
    111,320.80x = 166,981.20 × 90,325.60
  4. Step 4: Simplify right side
    111,320.80x = 15,082,677,078.72
  5. Step 5: Solve for x
    x = 15,082,677,078.72/111,320.80
  6. Step 6: Final answer
    x = 135,488.40

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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.