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Finding the Fourth Proportional to 188,643.53, 260,312.54 and 111,107.09

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Solution

The fourth proportional to 188,643.53, 260,312.54 and 111,107.09 is: 153,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,643.53 : 260,312.54 = 111,107.09 : x
  2. Step 2: Convert to fraction form
    188,643.53/260,312.54 = 111,107.09/x
  3. Step 3: Cross multiply
    188,643.53x = 260,312.54 × 111,107.09
  4. Step 4: Simplify right side
    188,643.53x = 28,922,568,905.15
  5. Step 5: Solve for x
    x = 28,922,568,905.15/188,643.53
  6. Step 6: Final answer
    x = 153,318.64

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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.