Home / 85,619.39-128,429.09-29,460.87

Finding the Fourth Proportional to 85,619.39, 128,429.09 and 29,460.87

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Solution

The fourth proportional to 85,619.39, 128,429.09 and 29,460.87 is: 44,191.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,619.39 : 128,429.09 = 29,460.87 : x
  2. Step 2: Convert to fraction form
    85,619.39/128,429.09 = 29,460.87/x
  3. Step 3: Cross multiply
    85,619.39x = 128,429.09 × 29,460.87
  4. Step 4: Simplify right side
    85,619.39x = 3,783,632,577.40
  5. Step 5: Solve for x
    x = 3,783,632,577.40/85,619.39
  6. Step 6: Final answer
    x = 44,191.31

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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.