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Finding the Fourth Proportional to 74,215.20, 111,322.08 and 18,811.20

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Solution

The fourth proportional to 74,215.20, 111,322.08 and 18,811.20 is: 28,216.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,215.20 : 111,322.08 = 18,811.20 : x
  2. Step 2: Convert to fraction form
    74,215.20/111,322.08 = 18,811.20/x
  3. Step 3: Cross multiply
    74,215.20x = 111,322.08 × 18,811.20
  4. Step 4: Simplify right side
    74,215.20x = 2,094,101,911.30
  5. Step 5: Solve for x
    x = 2,094,101,911.30/74,215.20
  6. Step 6: Final answer
    x = 28,216.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.