Home / 100,492.08-138,679.65-55,172.04

Finding the Fourth Proportional to 100,492.08, 138,679.65 and 55,172.04

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Solution

The fourth proportional to 100,492.08, 138,679.65 and 55,172.04 is: 76,137.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,492.08 : 138,679.65 = 55,172.04 : x
  2. Step 2: Convert to fraction form
    100,492.08/138,679.65 = 55,172.04/x
  3. Step 3: Cross multiply
    100,492.08x = 138,679.65 × 55,172.04
  4. Step 4: Simplify right side
    100,492.08x = 7,651,239,196.99
  5. Step 5: Solve for x
    x = 7,651,239,196.99/100,492.08
  6. Step 6: Final answer
    x = 76,137.73

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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.