Home / 100,739.03-139,017.60-55,416.02

Finding the Fourth Proportional to 100,739.03, 139,017.60 and 55,416.02

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Solution

The fourth proportional to 100,739.03, 139,017.60 and 55,416.02 is: 76,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,739.03 : 139,017.60 = 55,416.02 : x
  2. Step 2: Convert to fraction form
    100,739.03/139,017.60 = 55,416.02/x
  3. Step 3: Cross multiply
    100,739.03x = 139,017.60 × 55,416.02
  4. Step 4: Simplify right side
    100,739.03x = 7,703,801,406.86
  5. Step 5: Solve for x
    x = 7,703,801,406.86/100,739.03
  6. Step 6: Final answer
    x = 76,472.86

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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.