Home / 66,786.81-100,157.13-19,389.06

Finding the Fourth Proportional to 66,786.81, 100,157.13 and 19,389.06

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Solution

The fourth proportional to 66,786.81, 100,157.13 and 19,389.06 is: 29,076.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,786.81 : 100,157.13 = 19,389.06 : x
  2. Step 2: Convert to fraction form
    66,786.81/100,157.13 = 19,389.06/x
  3. Step 3: Cross multiply
    66,786.81x = 100,157.13 × 19,389.06
  4. Step 4: Simplify right side
    66,786.81x = 1,941,952,603.00
  5. Step 5: Solve for x
    x = 1,941,952,603.00/66,786.81
  6. Step 6: Final answer
    x = 29,076.89

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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.