Home / 145,039.08-217,558.32-81,830.51

Finding the Fourth Proportional to 145,039.08, 217,558.32 and 81,830.51

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Solution

The fourth proportional to 145,039.08, 217,558.32 and 81,830.51 is: 122,745.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,039.08 : 217,558.32 = 81,830.51 : x
  2. Step 2: Convert to fraction form
    145,039.08/217,558.32 = 81,830.51/x
  3. Step 3: Cross multiply
    145,039.08x = 217,558.32 × 81,830.51
  4. Step 4: Simplify right side
    145,039.08x = 17,802,907,281.21
  5. Step 5: Solve for x
    x = 17,802,907,281.21/145,039.08
  6. Step 6: Final answer
    x = 122,745.59

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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.