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Finding the Fourth Proportional to 54,492.40, 81,741.84 and 21,201.40

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Solution

The fourth proportional to 54,492.40, 81,741.84 and 21,201.40 is: 31,803.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,492.40 : 81,741.84 = 21,201.40 : x
  2. Step 2: Convert to fraction form
    54,492.40/81,741.84 = 21,201.40/x
  3. Step 3: Cross multiply
    54,492.40x = 81,741.84 × 21,201.40
  4. Step 4: Simplify right side
    54,492.40x = 1,733,041,446.58
  5. Step 5: Solve for x
    x = 1,733,041,446.58/54,492.40
  6. Step 6: Final answer
    x = 31,803.36

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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.