Home / 100,271.08-138,183.62-71,927.72

Finding the Fourth Proportional to 100,271.08, 138,183.62 and 71,927.72

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Solution

The fourth proportional to 100,271.08, 138,183.62 and 71,927.72 is: 99,123.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,271.08 : 138,183.62 = 71,927.72 : x
  2. Step 2: Convert to fraction form
    100,271.08/138,183.62 = 71,927.72/x
  3. Step 3: Cross multiply
    100,271.08x = 138,183.62 × 71,927.72
  4. Step 4: Simplify right side
    100,271.08x = 9,939,232,727.95
  5. Step 5: Solve for x
    x = 9,939,232,727.95/100,271.08
  6. Step 6: Final answer
    x = 99,123.62

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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.