Home / 185,640.47-278,416.10-85,704.65

Finding the Fourth Proportional to 185,640.47, 278,416.10 and 85,704.65

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Solution

The fourth proportional to 185,640.47, 278,416.10 and 85,704.65 is: 128,536.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,640.47 : 278,416.10 = 85,704.65 : x
  2. Step 2: Convert to fraction form
    185,640.47/278,416.10 = 85,704.65/x
  3. Step 3: Cross multiply
    185,640.47x = 278,416.10 × 85,704.65
  4. Step 4: Simplify right side
    185,640.47x = 23,861,554,271.11
  5. Step 5: Solve for x
    x = 23,861,554,271.11/185,640.47
  6. Step 6: Final answer
    x = 128,536.38

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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.