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Finding the Fourth Proportional to 189,071.36, 260,907.72 and 108,491.12

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Solution

The fourth proportional to 189,071.36, 260,907.72 and 108,491.12 is: 149,711.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,071.36 : 260,907.72 = 108,491.12 : x
  2. Step 2: Convert to fraction form
    189,071.36/260,907.72 = 108,491.12/x
  3. Step 3: Cross multiply
    189,071.36x = 260,907.72 × 108,491.12
  4. Step 4: Simplify right side
    189,071.36x = 28,306,170,759.45
  5. Step 5: Solve for x
    x = 28,306,170,759.45/189,071.36
  6. Step 6: Final answer
    x = 149,711.57

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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.