Home / 100,989.08-139,498.04-75,451.06

Finding the Fourth Proportional to 100,989.08, 139,498.04 and 75,451.06

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Solution

The fourth proportional to 100,989.08, 139,498.04 and 75,451.06 is: 104,221.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,989.08 : 139,498.04 = 75,451.06 : x
  2. Step 2: Convert to fraction form
    100,989.08/139,498.04 = 75,451.06/x
  3. Step 3: Cross multiply
    100,989.08x = 139,498.04 × 75,451.06
  4. Step 4: Simplify right side
    100,989.08x = 10,525,274,985.92
  5. Step 5: Solve for x
    x = 10,525,274,985.92/100,989.08
  6. Step 6: Final answer
    x = 104,221.91

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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.