Home / 137,896.12-190,296.54-78,280.12

Finding the Fourth Proportional to 137,896.12, 190,296.54 and 78,280.12

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Solution

The fourth proportional to 137,896.12, 190,296.54 and 78,280.12 is: 108,026.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,896.12 : 190,296.54 = 78,280.12 : x
  2. Step 2: Convert to fraction form
    137,896.12/190,296.54 = 78,280.12/x
  3. Step 3: Cross multiply
    137,896.12x = 190,296.54 × 78,280.12
  4. Step 4: Simplify right side
    137,896.12x = 14,896,435,986.78
  5. Step 5: Solve for x
    x = 14,896,435,986.78/137,896.12
  6. Step 6: Final answer
    x = 108,026.51

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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.