Home / 128,639.13-193,077.15-65,504.38

Finding the Fourth Proportional to 128,639.13, 193,077.15 and 65,504.38

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Solution

The fourth proportional to 128,639.13, 193,077.15 and 65,504.38 is: 98,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,639.13 : 193,077.15 = 65,504.38 : x
  2. Step 2: Convert to fraction form
    128,639.13/193,077.15 = 65,504.38/x
  3. Step 3: Cross multiply
    128,639.13x = 193,077.15 × 65,504.38
  4. Step 4: Simplify right side
    128,639.13x = 12,647,399,002.92
  5. Step 5: Solve for x
    x = 12,647,399,002.92/128,639.13
  6. Step 6: Final answer
    x = 98,316.89

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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.