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Finding the Fourth Proportional to 85,676.70, 128,515.02 and 23,347.20

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Solution

The fourth proportional to 85,676.70, 128,515.02 and 23,347.20 is: 35,020.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,676.70 : 128,515.02 = 23,347.20 : x
  2. Step 2: Convert to fraction form
    85,676.70/128,515.02 = 23,347.20/x
  3. Step 3: Cross multiply
    85,676.70x = 128,515.02 × 23,347.20
  4. Step 4: Simplify right side
    85,676.70x = 3,000,465,874.94
  5. Step 5: Solve for x
    x = 3,000,465,874.94/85,676.70
  6. Step 6: Final answer
    x = 35,020.79

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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.