Home / 85,405.50-128,185.99-45,458.02

Finding the Fourth Proportional to 85,405.50, 128,185.99 and 45,458.02

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Solution

The fourth proportional to 85,405.50, 128,185.99 and 45,458.02 is: 68,228.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,405.50 : 128,185.99 = 45,458.02 : x
  2. Step 2: Convert to fraction form
    85,405.50/128,185.99 = 45,458.02/x
  3. Step 3: Cross multiply
    85,405.50x = 128,185.99 × 45,458.02
  4. Step 4: Simplify right side
    85,405.50x = 5,827,081,297.14
  5. Step 5: Solve for x
    x = 5,827,081,297.14/85,405.50
  6. Step 6: Final answer
    x = 68,228.41

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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.