Home / 81,285.74-112,212.68-61,150.31

Finding the Fourth Proportional to 81,285.74, 112,212.68 and 61,150.31

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Solution

The fourth proportional to 81,285.74, 112,212.68 and 61,150.31 is: 84,416.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,285.74 : 112,212.68 = 61,150.31 : x
  2. Step 2: Convert to fraction form
    81,285.74/112,212.68 = 61,150.31/x
  3. Step 3: Cross multiply
    81,285.74x = 112,212.68 × 61,150.31
  4. Step 4: Simplify right side
    81,285.74x = 6,861,839,301.12
  5. Step 5: Solve for x
    x = 6,861,839,301.12/81,285.74
  6. Step 6: Final answer
    x = 84,416.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.