Home / 128,606.73-177,433.50-74,880.37

Finding the Fourth Proportional to 128,606.73, 177,433.50 and 74,880.37

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Solution

The fourth proportional to 128,606.73, 177,433.50 and 74,880.37 is: 103,309.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.73 : 177,433.50 = 74,880.37 : x
  2. Step 2: Convert to fraction form
    128,606.73/177,433.50 = 74,880.37/x
  3. Step 3: Cross multiply
    128,606.73x = 177,433.50 × 74,880.37
  4. Step 4: Simplify right side
    128,606.73x = 13,286,286,130.40
  5. Step 5: Solve for x
    x = 13,286,286,130.40/128,606.73
  6. Step 6: Final answer
    x = 103,309.42

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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.