Home / 100,725.51-138,991.55-55,402.77

Finding the Fourth Proportional to 100,725.51, 138,991.55 and 55,402.77

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Solution

The fourth proportional to 100,725.51, 138,991.55 and 55,402.77 is: 76,450.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.51 : 138,991.55 = 55,402.77 : x
  2. Step 2: Convert to fraction form
    100,725.51/138,991.55 = 55,402.77/x
  3. Step 3: Cross multiply
    100,725.51x = 138,991.55 × 55,402.77
  4. Step 4: Simplify right side
    100,725.51x = 7,700,516,181.64
  5. Step 5: Solve for x
    x = 7,700,516,181.64/100,725.51
  6. Step 6: Final answer
    x = 76,450.51

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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.