Home / 189,411.56-261,379.72-103,368.36

Finding the Fourth Proportional to 189,411.56, 261,379.72 and 103,368.36

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Solution

The fourth proportional to 189,411.56, 261,379.72 and 103,368.36 is: 142,643.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,411.56 : 261,379.72 = 103,368.36 : x
  2. Step 2: Convert to fraction form
    189,411.56/261,379.72 = 103,368.36/x
  3. Step 3: Cross multiply
    189,411.56x = 261,379.72 × 103,368.36
  4. Step 4: Simplify right side
    189,411.56x = 27,018,394,103.04
  5. Step 5: Solve for x
    x = 27,018,394,103.04/189,411.56
  6. Step 6: Final answer
    x = 142,643.85

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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.