Home / 136,004.78-187,632.86-78,633.60

Finding the Fourth Proportional to 136,004.78, 187,632.86 and 78,633.60

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Solution

The fourth proportional to 136,004.78, 187,632.86 and 78,633.60 is: 108,483.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,004.78 : 187,632.86 = 78,633.60 : x
  2. Step 2: Convert to fraction form
    136,004.78/187,632.86 = 78,633.60/x
  3. Step 3: Cross multiply
    136,004.78x = 187,632.86 × 78,633.60
  4. Step 4: Simplify right side
    136,004.78x = 14,754,246,866.93
  5. Step 5: Solve for x
    x = 14,754,246,866.93/136,004.78
  6. Step 6: Final answer
    x = 108,483.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.