Home / 128,738.34-193,160.81-69,504.35

Finding the Fourth Proportional to 128,738.34, 193,160.81 and 69,504.35

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Solution

The fourth proportional to 128,738.34, 193,160.81 and 69,504.35 is: 104,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,738.34 : 193,160.81 = 69,504.35 : x
  2. Step 2: Convert to fraction form
    128,738.34/193,160.81 = 69,504.35/x
  3. Step 3: Cross multiply
    128,738.34x = 193,160.81 × 69,504.35
  4. Step 4: Simplify right side
    128,738.34x = 13,425,517,201.19
  5. Step 5: Solve for x
    x = 13,425,517,201.19/128,738.34
  6. Step 6: Final answer
    x = 104,285.31

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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.