Home / 100,467.27-138,643.95-55,147.15

Finding the Fourth Proportional to 100,467.27, 138,643.95 and 55,147.15

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Solution

The fourth proportional to 100,467.27, 138,643.95 and 55,147.15 is: 76,102.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,467.27 : 138,643.95 = 55,147.15 : x
  2. Step 2: Convert to fraction form
    100,467.27/138,643.95 = 55,147.15/x
  3. Step 3: Cross multiply
    100,467.27x = 138,643.95 × 55,147.15
  4. Step 4: Simplify right side
    100,467.27x = 7,645,818,707.24
  5. Step 5: Solve for x
    x = 7,645,818,707.24/100,467.27
  6. Step 6: Final answer
    x = 76,102.58

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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.