Home / 82,623.36-123,121.84-77,636.48

Finding the Fourth Proportional to 82,623.36, 123,121.84 and 77,636.48

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Solution

The fourth proportional to 82,623.36, 123,121.84 and 77,636.48 is: 115,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,623.36 : 123,121.84 = 77,636.48 : x
  2. Step 2: Convert to fraction form
    82,623.36/123,121.84 = 77,636.48/x
  3. Step 3: Cross multiply
    82,623.36x = 123,121.84 × 77,636.48
  4. Step 4: Simplify right side
    82,623.36x = 9,558,746,268.72
  5. Step 5: Solve for x
    x = 9,558,746,268.72/82,623.36
  6. Step 6: Final answer
    x = 115,690.60

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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.