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Finding the Fourth Proportional to 57,676.80, 79,564.80 and 53,126.40

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Solution

The fourth proportional to 57,676.80, 79,564.80 and 53,126.40 is: 73,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,676.80 : 79,564.80 = 53,126.40 : x
  2. Step 2: Convert to fraction form
    57,676.80/79,564.80 = 53,126.40/x
  3. Step 3: Cross multiply
    57,676.80x = 79,564.80 × 53,126.40
  4. Step 4: Simplify right side
    57,676.80x = 4,226,991,390.72
  5. Step 5: Solve for x
    x = 4,226,991,390.72/57,676.80
  6. Step 6: Final answer
    x = 73,287.55

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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.