Home / 85,759.36-127,878.56-80,039.68

Finding the Fourth Proportional to 85,759.36, 127,878.56 and 80,039.68

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Solution

The fourth proportional to 85,759.36, 127,878.56 and 80,039.68 is: 119,349.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,759.36 : 127,878.56 = 80,039.68 : x
  2. Step 2: Convert to fraction form
    85,759.36/127,878.56 = 80,039.68/x
  3. Step 3: Cross multiply
    85,759.36x = 127,878.56 × 80,039.68
  4. Step 4: Simplify right side
    85,759.36x = 10,235,359,021.26
  5. Step 5: Solve for x
    x = 10,235,359,021.26/85,759.36
  6. Step 6: Final answer
    x = 119,349.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.