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Finding the Fourth Proportional to 57,638.40, 86,284.80 and 54,220.80

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Solution

The fourth proportional to 57,638.40, 86,284.80 and 54,220.80 is: 81,168.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,638.40 : 86,284.80 = 54,220.80 : x
  2. Step 2: Convert to fraction form
    57,638.40/86,284.80 = 54,220.80/x
  3. Step 3: Cross multiply
    57,638.40x = 86,284.80 × 54,220.80
  4. Step 4: Simplify right side
    57,638.40x = 4,678,430,883.84
  5. Step 5: Solve for x
    x = 4,678,430,883.84/57,638.40
  6. Step 6: Final answer
    x = 81,168.65

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1.5x scale

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.