Home / 85,819.55-128,561.74-40,776.81

Finding the Fourth Proportional to 85,819.55, 128,561.74 and 40,776.81

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Solution

The fourth proportional to 85,819.55, 128,561.74 and 40,776.81 is: 61,085.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.55 : 128,561.74 = 40,776.81 : x
  2. Step 2: Convert to fraction form
    85,819.55/128,561.74 = 40,776.81/x
  3. Step 3: Cross multiply
    85,819.55x = 128,561.74 × 40,776.81
  4. Step 4: Simplify right side
    85,819.55x = 5,242,337,645.25
  5. Step 5: Solve for x
    x = 5,242,337,645.25/85,819.55
  6. Step 6: Final answer
    x = 61,085.59

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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.