Home / 205,516.68-308,318.15-87,185.40

Finding the Fourth Proportional to 205,516.68, 308,318.15 and 87,185.40

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Solution

The fourth proportional to 205,516.68, 308,318.15 and 87,185.40 is: 130,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,516.68 : 308,318.15 = 87,185.40 : x
  2. Step 2: Convert to fraction form
    205,516.68/308,318.15 = 87,185.40/x
  3. Step 3: Cross multiply
    205,516.68x = 308,318.15 × 87,185.40
  4. Step 4: Simplify right side
    205,516.68x = 26,880,841,235.01
  5. Step 5: Solve for x
    x = 26,880,841,235.01/205,516.68
  6. Step 6: Final answer
    x = 130,796.40

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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.