Home / 78,300.36-117,450.12-19,136.28

Finding the Fourth Proportional to 78,300.36, 117,450.12 and 19,136.28

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Solution

The fourth proportional to 78,300.36, 117,450.12 and 19,136.28 is: 28,704.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,300.36 : 117,450.12 = 19,136.28 : x
  2. Step 2: Convert to fraction form
    78,300.36/117,450.12 = 19,136.28/x
  3. Step 3: Cross multiply
    78,300.36x = 117,450.12 × 19,136.28
  4. Step 4: Simplify right side
    78,300.36x = 2,247,558,382.35
  5. Step 5: Solve for x
    x = 2,247,558,382.35/78,300.36
  6. Step 6: Final answer
    x = 28,704.32

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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.