Home / 100,623.86-138,851.90-55,301.36

Finding the Fourth Proportional to 100,623.86, 138,851.90 and 55,301.36

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Solution

The fourth proportional to 100,623.86, 138,851.90 and 55,301.36 is: 76,310.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,623.86 : 138,851.90 = 55,301.36 : x
  2. Step 2: Convert to fraction form
    100,623.86/138,851.90 = 55,301.36/x
  3. Step 3: Cross multiply
    100,623.86x = 138,851.90 × 55,301.36
  4. Step 4: Simplify right side
    100,623.86x = 7,678,698,908.58
  5. Step 5: Solve for x
    x = 7,678,698,908.58/100,623.86
  6. Step 6: Final answer
    x = 76,310.92

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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.