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Finding the Fourth Proportional to 85,370.10, 128,160.45 and 53,780.10

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Solution

The fourth proportional to 85,370.10, 128,160.45 and 53,780.10 is: 80,736.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.10 : 128,160.45 = 53,780.10 : x
  2. Step 2: Convert to fraction form
    85,370.10/128,160.45 = 53,780.10/x
  3. Step 3: Cross multiply
    85,370.10x = 128,160.45 × 53,780.10
  4. Step 4: Simplify right side
    85,370.10x = 6,892,481,817.05
  5. Step 5: Solve for x
    x = 6,892,481,817.05/85,370.10
  6. Step 6: Final answer
    x = 80,736.49

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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.