Home / 128,900.40-193,359.81-53,945.07

Finding the Fourth Proportional to 128,900.40, 193,359.81 and 53,945.07

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Solution

The fourth proportional to 128,900.40, 193,359.81 and 53,945.07 is: 80,921.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,900.40 : 193,359.81 = 53,945.07 : x
  2. Step 2: Convert to fraction form
    128,900.40/193,359.81 = 53,945.07/x
  3. Step 3: Cross multiply
    128,900.40x = 193,359.81 × 53,945.07
  4. Step 4: Simplify right side
    128,900.40x = 10,430,808,485.64
  5. Step 5: Solve for x
    x = 10,430,808,485.64/128,900.40
  6. Step 6: Final answer
    x = 80,921.46

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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.