Home / 86,620.32-129,843-34,009.20

Finding the Fourth Proportional to 86,620.32, 129,843 and 34,009.20

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Solution

The fourth proportional to 86,620.32, 129,843 and 34,009.20 is: 50,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,620.32 : 129,843 = 34,009.20 : x
  2. Step 2: Convert to fraction form
    86,620.32/129,843 = 34,009.20/x
  3. Step 3: Cross multiply
    86,620.32x = 129,843 × 34,009.20
  4. Step 4: Simplify right side
    86,620.32x = 4,415,856,555.60
  5. Step 5: Solve for x
    x = 4,415,856,555.60/86,620.32
  6. Step 6: Final answer
    x = 50,979.45

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1.5x scale

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.