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Finding the Fourth Proportional to 189,012.60, 260,849.16 and 104,129.64

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Solution

The fourth proportional to 189,012.60, 260,849.16 and 104,129.64 is: 143,705.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,012.60 : 260,849.16 = 104,129.64 : x
  2. Step 2: Convert to fraction form
    189,012.60/260,849.16 = 104,129.64/x
  3. Step 3: Cross multiply
    189,012.60x = 260,849.16 × 104,129.64
  4. Step 4: Simplify right side
    189,012.60x = 27,162,129,125.10
  5. Step 5: Solve for x
    x = 27,162,129,125.10/189,012.60
  6. Step 6: Final answer
    x = 143,705.39

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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.