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Finding the Fourth Proportional to 53,418.80, 79,955.40 and 49,271.60

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Solution

The fourth proportional to 53,418.80, 79,955.40 and 49,271.60 is: 73,748.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,418.80 : 79,955.40 = 49,271.60 : x
  2. Step 2: Convert to fraction form
    53,418.80/79,955.40 = 49,271.60/x
  3. Step 3: Cross multiply
    53,418.80x = 79,955.40 × 49,271.60
  4. Step 4: Simplify right side
    53,418.80x = 3,939,530,486.64
  5. Step 5: Solve for x
    x = 3,939,530,486.64/53,418.80
  6. Step 6: Final answer
    x = 73,748.02

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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.