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Finding the Fourth Proportional to 128,509.37, 177,361.55 and 74,050.94

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Solution

The fourth proportional to 128,509.37, 177,361.55 and 74,050.94 is: 102,201.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,509.37 : 177,361.55 = 74,050.94 : x
  2. Step 2: Convert to fraction form
    128,509.37/177,361.55 = 74,050.94/x
  3. Step 3: Cross multiply
    128,509.37x = 177,361.55 × 74,050.94
  4. Step 4: Simplify right side
    128,509.37x = 13,133,790,597.29
  5. Step 5: Solve for x
    x = 13,133,790,597.29/128,509.37
  6. Step 6: Final answer
    x = 102,201.03

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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.