Home / 100,653.26-138,893.40-55,330.11

Finding the Fourth Proportional to 100,653.26, 138,893.40 and 55,330.11

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Solution

The fourth proportional to 100,653.26, 138,893.40 and 55,330.11 is: 76,351.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,653.26 : 138,893.40 = 55,330.11 : x
  2. Step 2: Convert to fraction form
    100,653.26/138,893.40 = 55,330.11/x
  3. Step 3: Cross multiply
    100,653.26x = 138,893.40 × 55,330.11
  4. Step 4: Simplify right side
    100,653.26x = 7,684,987,100.27
  5. Step 5: Solve for x
    x = 7,684,987,100.27/100,653.26
  6. Step 6: Final answer
    x = 76,351.10

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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.