Home / 85,465.12-128,243.58-35,579.65

Finding the Fourth Proportional to 85,465.12, 128,243.58 and 35,579.65

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Solution

The fourth proportional to 85,465.12, 128,243.58 and 35,579.65 is: 53,388.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,465.12 : 128,243.58 = 35,579.65 : x
  2. Step 2: Convert to fraction form
    85,465.12/128,243.58 = 35,579.65/x
  3. Step 3: Cross multiply
    85,465.12x = 128,243.58 × 35,579.65
  4. Step 4: Simplify right side
    85,465.12x = 4,562,861,691.15
  5. Step 5: Solve for x
    x = 4,562,861,691.15/85,465.12
  6. Step 6: Final answer
    x = 53,388.58

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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.