Home / 129,464.51-178,635.44-81,783.23

Finding the Fourth Proportional to 129,464.51, 178,635.44 and 81,783.23

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Solution

The fourth proportional to 129,464.51, 178,635.44 and 81,783.23 is: 112,844.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,464.51 : 178,635.44 = 81,783.23 : x
  2. Step 2: Convert to fraction form
    129,464.51/178,635.44 = 81,783.23/x
  3. Step 3: Cross multiply
    129,464.51x = 178,635.44 × 81,783.23
  4. Step 4: Simplify right side
    129,464.51x = 14,609,382,586.95
  5. Step 5: Solve for x
    x = 14,609,382,586.95/129,464.51
  6. Step 6: Final answer
    x = 112,844.70

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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.