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Finding the Fourth Proportional to 115,918.40, 173,902.80 and 66,022.40

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Solution

The fourth proportional to 115,918.40, 173,902.80 and 66,022.40 is: 99,047.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,918.40 : 173,902.80 = 66,022.40 : x
  2. Step 2: Convert to fraction form
    115,918.40/173,902.80 = 66,022.40/x
  3. Step 3: Cross multiply
    115,918.40x = 173,902.80 × 66,022.40
  4. Step 4: Simplify right side
    115,918.40x = 11,481,480,222.72
  5. Step 5: Solve for x
    x = 11,481,480,222.72/115,918.40
  6. Step 6: Final answer
    x = 99,047.95

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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.