Home / 100,103.04-138,146.40-55,391.04

Finding the Fourth Proportional to 100,103.04, 138,146.40 and 55,391.04

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Solution

The fourth proportional to 100,103.04, 138,146.40 and 55,391.04 is: 76,441.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,103.04 : 138,146.40 = 55,391.04 : x
  2. Step 2: Convert to fraction form
    100,103.04/138,146.40 = 55,391.04/x
  3. Step 3: Cross multiply
    100,103.04x = 138,146.40 × 55,391.04
  4. Step 4: Simplify right side
    100,103.04x = 7,652,072,768.26
  5. Step 5: Solve for x
    x = 7,652,072,768.26/100,103.04
  6. Step 6: Final answer
    x = 76,441.96

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1.5x scale

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.