Home / 81,086.08-111,976.08-76,668.40

Finding the Fourth Proportional to 81,086.08, 111,976.08 and 76,668.40

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Solution

The fourth proportional to 81,086.08, 111,976.08 and 76,668.40 is: 105,875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,086.08 : 111,976.08 = 76,668.40 : x
  2. Step 2: Convert to fraction form
    81,086.08/111,976.08 = 76,668.40/x
  3. Step 3: Cross multiply
    81,086.08x = 111,976.08 × 76,668.40
  4. Step 4: Simplify right side
    81,086.08x = 8,585,026,891.87
  5. Step 5: Solve for x
    x = 8,585,026,891.87/81,086.08
  6. Step 6: Final answer
    x = 105,875.47

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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.