Home / 107,021.80-147,789.36-80,117.60

Finding the Fourth Proportional to 107,021.80, 147,789.36 and 80,117.60

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Solution

The fourth proportional to 107,021.80, 147,789.36 and 80,117.60 is: 110,636.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,021.80 : 147,789.36 = 80,117.60 : x
  2. Step 2: Convert to fraction form
    107,021.80/147,789.36 = 80,117.60/x
  3. Step 3: Cross multiply
    107,021.80x = 147,789.36 × 80,117.60
  4. Step 4: Simplify right side
    107,021.80x = 11,840,528,828.74
  5. Step 5: Solve for x
    x = 11,840,528,828.74/107,021.80
  6. Step 6: Final answer
    x = 110,636.61

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1.5x scale

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.