Home / 189,721.72-261,812.78-103,678.80

Finding the Fourth Proportional to 189,721.72, 261,812.78 and 103,678.80

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Solution

The fourth proportional to 189,721.72, 261,812.78 and 103,678.80 is: 143,075.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,721.72 : 261,812.78 = 103,678.80 : x
  2. Step 2: Convert to fraction form
    189,721.72/261,812.78 = 103,678.80/x
  3. Step 3: Cross multiply
    189,721.72x = 261,812.78 × 103,678.80
  4. Step 4: Simplify right side
    189,721.72x = 27,144,434,855.06
  5. Step 5: Solve for x
    x = 27,144,434,855.06/189,721.72
  6. Step 6: Final answer
    x = 143,075.00

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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.