Home / 128,739.34-193,162.31-69,505.35

Finding the Fourth Proportional to 128,739.34, 193,162.31 and 69,505.35

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Solution

The fourth proportional to 128,739.34, 193,162.31 and 69,505.35 is: 104,286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,739.34 : 193,162.31 = 69,505.35 : x
  2. Step 2: Convert to fraction form
    128,739.34/193,162.31 = 69,505.35/x
  3. Step 3: Cross multiply
    128,739.34x = 193,162.31 × 69,505.35
  4. Step 4: Simplify right side
    128,739.34x = 13,425,813,963.36
  5. Step 5: Solve for x
    x = 13,425,813,963.36/128,739.34
  6. Step 6: Final answer
    x = 104,286.80

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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.