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Finding the Fourth Proportional to 86,012.80, 128,846.40 and 49,033.60

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Solution

The fourth proportional to 86,012.80, 128,846.40 and 49,033.60 is: 73,451.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,012.80 : 128,846.40 = 49,033.60 : x
  2. Step 2: Convert to fraction form
    86,012.80/128,846.40 = 49,033.60/x
  3. Step 3: Cross multiply
    86,012.80x = 128,846.40 × 49,033.60
  4. Step 4: Simplify right side
    86,012.80x = 6,317,802,839.04
  5. Step 5: Solve for x
    x = 6,317,802,839.04/86,012.80
  6. Step 6: Final answer
    x = 73,451.89

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1.5x scale

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.