Home / 111,030.80-166,546.20-81,287.60

Finding the Fourth Proportional to 111,030.80, 166,546.20 and 81,287.60

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Solution

The fourth proportional to 111,030.80, 166,546.20 and 81,287.60 is: 121,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,030.80 : 166,546.20 = 81,287.60 : x
  2. Step 2: Convert to fraction form
    111,030.80/166,546.20 = 81,287.60/x
  3. Step 3: Cross multiply
    111,030.80x = 166,546.20 × 81,287.60
  4. Step 4: Simplify right side
    111,030.80x = 13,538,140,887.12
  5. Step 5: Solve for x
    x = 13,538,140,887.12/111,030.80
  6. Step 6: Final answer
    x = 121,931.40

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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.