Home / 81,189.54-111,445.07-72,036.95

Finding the Fourth Proportional to 81,189.54, 111,445.07 and 72,036.95

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Solution

The fourth proportional to 81,189.54, 111,445.07 and 72,036.95 is: 98,881.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,189.54 : 111,445.07 = 72,036.95 : x
  2. Step 2: Convert to fraction form
    81,189.54/111,445.07 = 72,036.95/x
  3. Step 3: Cross multiply
    81,189.54x = 111,445.07 × 72,036.95
  4. Step 4: Simplify right side
    81,189.54x = 8,028,162,017.93
  5. Step 5: Solve for x
    x = 8,028,162,017.93/81,189.54
  6. Step 6: Final answer
    x = 98,881.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.