Home / 85,515.68-128,285.60-26,356.16

Finding the Fourth Proportional to 85,515.68, 128,285.60 and 26,356.16

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Solution

The fourth proportional to 85,515.68, 128,285.60 and 26,356.16 is: 39,537.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.68 : 128,285.60 = 26,356.16 : x
  2. Step 2: Convert to fraction form
    85,515.68/128,285.60 = 26,356.16/x
  3. Step 3: Cross multiply
    85,515.68x = 128,285.60 × 26,356.16
  4. Step 4: Simplify right side
    85,515.68x = 3,381,115,799.30
  5. Step 5: Solve for x
    x = 3,381,115,799.30/85,515.68
  6. Step 6: Final answer
    x = 39,537.96

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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.