Home / 189,721.26-261,812.16-103,678.35

Finding the Fourth Proportional to 189,721.26, 261,812.16 and 103,678.35

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Solution

The fourth proportional to 189,721.26, 261,812.16 and 103,678.35 is: 143,074.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,721.26 : 261,812.16 = 103,678.35 : x
  2. Step 2: Convert to fraction form
    189,721.26/261,812.16 = 103,678.35/x
  3. Step 3: Cross multiply
    189,721.26x = 261,812.16 × 103,678.35
  4. Step 4: Simplify right side
    189,721.26x = 27,144,252,758.74
  5. Step 5: Solve for x
    x = 27,144,252,758.74/189,721.26
  6. Step 6: Final answer
    x = 143,074.39

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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.