Home / 189,739.06-261,840.72-103,699.78

Finding the Fourth Proportional to 189,739.06, 261,840.72 and 103,699.78

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Solution

The fourth proportional to 189,739.06, 261,840.72 and 103,699.78 is: 143,106.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,739.06 : 261,840.72 = 103,699.78 : x
  2. Step 2: Convert to fraction form
    189,739.06/261,840.72 = 103,699.78/x
  3. Step 3: Cross multiply
    189,739.06x = 261,840.72 × 103,699.78
  4. Step 4: Simplify right side
    189,739.06x = 27,152,825,059.04
  5. Step 5: Solve for x
    x = 27,152,825,059.04/189,739.06
  6. Step 6: Final answer
    x = 143,106.14

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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.