Home / 100,727.06-139,000.40-55,405.03

Finding the Fourth Proportional to 100,727.06, 139,000.40 and 55,405.03

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Solution

The fourth proportional to 100,727.06, 139,000.40 and 55,405.03 is: 76,457.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,727.06 : 139,000.40 = 55,405.03 : x
  2. Step 2: Convert to fraction form
    100,727.06/139,000.40 = 55,405.03/x
  3. Step 3: Cross multiply
    100,727.06x = 139,000.40 × 55,405.03
  4. Step 4: Simplify right side
    100,727.06x = 7,701,321,487.53
  5. Step 5: Solve for x
    x = 7,701,321,487.53/100,727.06
  6. Step 6: Final answer
    x = 76,457.32

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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.