Home / 128,968.89-193,559.94-65,835.66

Finding the Fourth Proportional to 128,968.89, 193,559.94 and 65,835.66

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Solution

The fourth proportional to 128,968.89, 193,559.94 and 65,835.66 is: 98,807.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,968.89 : 193,559.94 = 65,835.66 : x
  2. Step 2: Convert to fraction form
    128,968.89/193,559.94 = 65,835.66/x
  3. Step 3: Cross multiply
    128,968.89x = 193,559.94 × 65,835.66
  4. Step 4: Simplify right side
    128,968.89x = 12,743,146,399.46
  5. Step 5: Solve for x
    x = 12,743,146,399.46/128,968.89
  6. Step 6: Final answer
    x = 98,807.91

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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.