Home / 100,469.12-138,499.44-76,554.40

Finding the Fourth Proportional to 100,469.12, 138,499.44 and 76,554.40

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Solution

The fourth proportional to 100,469.12, 138,499.44 and 76,554.40 is: 105,532.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,469.12 : 138,499.44 = 76,554.40 : x
  2. Step 2: Convert to fraction form
    100,469.12/138,499.44 = 76,554.40/x
  3. Step 3: Cross multiply
    100,469.12x = 138,499.44 × 76,554.40
  4. Step 4: Simplify right side
    100,469.12x = 10,602,741,529.54
  5. Step 5: Solve for x
    x = 10,602,741,529.54/100,469.12
  6. Step 6: Final answer
    x = 105,532.34

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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.