Home / 81,640.35-112,680.26-47,186.55

Finding the Fourth Proportional to 81,640.35, 112,680.26 and 47,186.55

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Solution

The fourth proportional to 81,640.35, 112,680.26 and 47,186.55 is: 65,127.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,640.35 : 112,680.26 = 47,186.55 : x
  2. Step 2: Convert to fraction form
    81,640.35/112,680.26 = 47,186.55/x
  3. Step 3: Cross multiply
    81,640.35x = 112,680.26 × 47,186.55
  4. Step 4: Simplify right side
    81,640.35x = 5,316,992,840.47
  5. Step 5: Solve for x
    x = 5,316,992,840.47/81,640.35
  6. Step 6: Final answer
    x = 65,127.02

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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.