Home / 100,408.36-138,566.10-55,088.28

Finding the Fourth Proportional to 100,408.36, 138,566.10 and 55,088.28

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Solution

The fourth proportional to 100,408.36, 138,566.10 and 55,088.28 is: 76,023.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,408.36 : 138,566.10 = 55,088.28 : x
  2. Step 2: Convert to fraction form
    100,408.36/138,566.10 = 55,088.28/x
  3. Step 3: Cross multiply
    100,408.36x = 138,566.10 × 55,088.28
  4. Step 4: Simplify right side
    100,408.36x = 7,633,368,115.31
  5. Step 5: Solve for x
    x = 7,633,368,115.31/100,408.36
  6. Step 6: Final answer
    x = 76,023.23

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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.