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Finding the Fourth Proportional to 53,085.84, 79,642.08 and 19,806.99

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Solution

The fourth proportional to 53,085.84, 79,642.08 and 19,806.99 is: 29,715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,085.84 : 79,642.08 = 19,806.99 : x
  2. Step 2: Convert to fraction form
    53,085.84/79,642.08 = 19,806.99/x
  3. Step 3: Cross multiply
    53,085.84x = 79,642.08 × 19,806.99
  4. Step 4: Simplify right side
    53,085.84x = 1,577,469,882.14
  5. Step 5: Solve for x
    x = 1,577,469,882.14/53,085.84
  6. Step 6: Final answer
    x = 29,715.45

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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.