Home / 68,109.81-102,168.56-20,726.45

Finding the Fourth Proportional to 68,109.81, 102,168.56 and 20,726.45

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Solution

The fourth proportional to 68,109.81, 102,168.56 and 20,726.45 is: 31,090.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,109.81 : 102,168.56 = 20,726.45 : x
  2. Step 2: Convert to fraction form
    68,109.81/102,168.56 = 20,726.45/x
  3. Step 3: Cross multiply
    68,109.81x = 102,168.56 × 20,726.45
  4. Step 4: Simplify right side
    68,109.81x = 2,117,590,987.75
  5. Step 5: Solve for x
    x = 2,117,590,987.75/68,109.81
  6. Step 6: Final answer
    x = 31,090.84

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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.