Home / 81,828.80-122,743.20-26,430.40

Finding the Fourth Proportional to 81,828.80, 122,743.20 and 26,430.40

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Solution

The fourth proportional to 81,828.80, 122,743.20 and 26,430.40 is: 39,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,828.80 : 122,743.20 = 26,430.40 : x
  2. Step 2: Convert to fraction form
    81,828.80/122,743.20 = 26,430.40/x
  3. Step 3: Cross multiply
    81,828.80x = 122,743.20 × 26,430.40
  4. Step 4: Simplify right side
    81,828.80x = 3,244,151,873.28
  5. Step 5: Solve for x
    x = 3,244,151,873.28/81,828.80
  6. Step 6: Final answer
    x = 39,645.60

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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.