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Finding the Fourth Proportional to 115,980.57, 160,038.23 and 68,216.49

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Solution

The fourth proportional to 115,980.57, 160,038.23 and 68,216.49 is: 94,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,980.57 : 160,038.23 = 68,216.49 : x
  2. Step 2: Convert to fraction form
    115,980.57/160,038.23 = 68,216.49/x
  3. Step 3: Cross multiply
    115,980.57x = 160,038.23 × 68,216.49
  4. Step 4: Simplify right side
    115,980.57x = 10,917,245,975.33
  5. Step 5: Solve for x
    x = 10,917,245,975.33/115,980.57
  6. Step 6: Final answer
    x = 94,129.96

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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.