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Finding the Fourth Proportional to 61,673.40, 84,855.60 and 57,736.80

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Solution

The fourth proportional to 61,673.40, 84,855.60 and 57,736.80 is: 79,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,673.40 : 84,855.60 = 57,736.80 : x
  2. Step 2: Convert to fraction form
    61,673.40/84,855.60 = 57,736.80/x
  3. Step 3: Cross multiply
    61,673.40x = 84,855.60 × 57,736.80
  4. Step 4: Simplify right side
    61,673.40x = 4,899,290,806.08
  5. Step 5: Solve for x
    x = 4,899,290,806.08/61,673.40
  6. Step 6: Final answer
    x = 79,439.29

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1.5x scale

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.