Home / 100,727.90-139,004.53-55,405.97

Finding the Fourth Proportional to 100,727.90, 139,004.53 and 55,405.97

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Solution

The fourth proportional to 100,727.90, 139,004.53 and 55,405.97 is: 76,460.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,727.90 : 139,004.53 = 55,405.97 : x
  2. Step 2: Convert to fraction form
    100,727.90/139,004.53 = 55,405.97/x
  3. Step 3: Cross multiply
    100,727.90x = 139,004.53 × 55,405.97
  4. Step 4: Simplify right side
    100,727.90x = 7,701,679,985.51
  5. Step 5: Solve for x
    x = 7,701,679,985.51/100,727.90
  6. Step 6: Final answer
    x = 76,460.25

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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.