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Finding the Fourth Proportional to 128,846.72, 177,830.70 and 75,163.16

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Solution

The fourth proportional to 128,846.72, 177,830.70 and 75,163.16 is: 103,738.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,846.72 : 177,830.70 = 75,163.16 : x
  2. Step 2: Convert to fraction form
    128,846.72/177,830.70 = 75,163.16/x
  3. Step 3: Cross multiply
    128,846.72x = 177,830.70 × 75,163.16
  4. Step 4: Simplify right side
    128,846.72x = 13,366,317,357.01
  5. Step 5: Solve for x
    x = 13,366,317,357.01/128,846.72
  6. Step 6: Final answer
    x = 103,738.13

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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.