Home / 85,819.05-128,560.99-40,776.31

Finding the Fourth Proportional to 85,819.05, 128,560.99 and 40,776.31

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Solution

The fourth proportional to 85,819.05, 128,560.99 and 40,776.31 is: 61,084.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.05 : 128,560.99 = 40,776.31 : x
  2. Step 2: Convert to fraction form
    85,819.05/128,560.99 = 40,776.31/x
  3. Step 3: Cross multiply
    85,819.05x = 128,560.99 × 40,776.31
  4. Step 4: Simplify right side
    85,819.05x = 5,242,242,139.34
  5. Step 5: Solve for x
    x = 5,242,242,139.34/85,819.05
  6. Step 6: Final answer
    x = 61,084.83

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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.