Home / 115,255.16-159,114.78-79,636.64

Finding the Fourth Proportional to 115,255.16, 159,114.78 and 79,636.64

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Solution

The fourth proportional to 115,255.16, 159,114.78 and 79,636.64 is: 109,941.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,255.16 : 159,114.78 = 79,636.64 : x
  2. Step 2: Convert to fraction form
    115,255.16/159,114.78 = 79,636.64/x
  3. Step 3: Cross multiply
    115,255.16x = 159,114.78 × 79,636.64
  4. Step 4: Simplify right side
    115,255.16x = 12,671,366,453.54
  5. Step 5: Solve for x
    x = 12,671,366,453.54/115,255.16
  6. Step 6: Final answer
    x = 109,941.86

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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.