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Finding the Fourth Proportional to 73,261.40, 109,811.10 and 28,873.40

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Solution

The fourth proportional to 73,261.40, 109,811.10 and 28,873.40 is: 43,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,261.40 : 109,811.10 = 28,873.40 : x
  2. Step 2: Convert to fraction form
    73,261.40/109,811.10 = 28,873.40/x
  3. Step 3: Cross multiply
    73,261.40x = 109,811.10 × 28,873.40
  4. Step 4: Simplify right side
    73,261.40x = 3,170,619,814.74
  5. Step 5: Solve for x
    x = 3,170,619,814.74/73,261.40
  6. Step 6: Final answer
    x = 43,278.18

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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.