Home / 86,021.60-128,973.45-43,819.97

Finding the Fourth Proportional to 86,021.60, 128,973.45 and 43,819.97

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Solution

The fourth proportional to 86,021.60, 128,973.45 and 43,819.97 is: 65,699.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,021.60 : 128,973.45 = 43,819.97 : x
  2. Step 2: Convert to fraction form
    86,021.60/128,973.45 = 43,819.97/x
  3. Step 3: Cross multiply
    86,021.60x = 128,973.45 × 43,819.97
  4. Step 4: Simplify right side
    86,021.60x = 5,651,612,709.80
  5. Step 5: Solve for x
    x = 5,651,612,709.80/86,021.60
  6. Step 6: Final answer
    x = 65,699.93

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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.