Home / 100,431.68-138,595.62-55,109.92

Finding the Fourth Proportional to 100,431.68, 138,595.62 and 55,109.92

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Solution

The fourth proportional to 100,431.68, 138,595.62 and 55,109.92 is: 76,051.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,431.68 : 138,595.62 = 55,109.92 : x
  2. Step 2: Convert to fraction form
    100,431.68/138,595.62 = 55,109.92/x
  3. Step 3: Cross multiply
    100,431.68x = 138,595.62 × 55,109.92
  4. Step 4: Simplify right side
    100,431.68x = 7,637,993,530.55
  5. Step 5: Solve for x
    x = 7,637,993,530.55/100,431.68
  6. Step 6: Final answer
    x = 76,051.64

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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.