Home / 138,280.72-190,830.72-77,853.36

Finding the Fourth Proportional to 138,280.72, 190,830.72 and 77,853.36

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Solution

The fourth proportional to 138,280.72, 190,830.72 and 77,853.36 is: 107,439.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,280.72 : 190,830.72 = 77,853.36 : x
  2. Step 2: Convert to fraction form
    138,280.72/190,830.72 = 77,853.36/x
  3. Step 3: Cross multiply
    138,280.72x = 190,830.72 × 77,853.36
  4. Step 4: Simplify right side
    138,280.72x = 14,856,812,743.22
  5. Step 5: Solve for x
    x = 14,856,812,743.22/138,280.72
  6. Step 6: Final answer
    x = 107,439.51

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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.