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Finding the Fourth Proportional to 79,409.84, 109,554.31 and 45,400.05

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Solution

The fourth proportional to 79,409.84, 109,554.31 and 45,400.05 is: 62,634.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,409.84 : 109,554.31 = 45,400.05 : x
  2. Step 2: Convert to fraction form
    79,409.84/109,554.31 = 45,400.05/x
  3. Step 3: Cross multiply
    79,409.84x = 109,554.31 × 45,400.05
  4. Step 4: Simplify right side
    79,409.84x = 4,973,771,151.72
  5. Step 5: Solve for x
    x = 4,973,771,151.72/79,409.84
  6. Step 6: Final answer
    x = 62,634.19

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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.