Home / 136,839.40-205,412.70-105,812.20

Finding the Fourth Proportional to 136,839.40, 205,412.70 and 105,812.20

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Solution

The fourth proportional to 136,839.40, 205,412.70 and 105,812.20 is: 158,837.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,839.40 : 205,412.70 = 105,812.20 : x
  2. Step 2: Convert to fraction form
    136,839.40/205,412.70 = 105,812.20/x
  3. Step 3: Cross multiply
    136,839.40x = 205,412.70 × 105,812.20
  4. Step 4: Simplify right side
    136,839.40x = 21,735,169,694.94
  5. Step 5: Solve for x
    x = 21,735,169,694.94/136,839.40
  6. Step 6: Final answer
    x = 158,837.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.