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Finding the Fourth Proportional to 81,676.17, 112,627.67 and 64,653.21

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Solution

The fourth proportional to 81,676.17, 112,627.67 and 64,653.21 is: 89,153.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,676.17 : 112,627.67 = 64,653.21 : x
  2. Step 2: Convert to fraction form
    81,676.17/112,627.67 = 64,653.21/x
  3. Step 3: Cross multiply
    81,676.17x = 112,627.67 × 64,653.21
  4. Step 4: Simplify right side
    81,676.17x = 7,281,740,077.05
  5. Step 5: Solve for x
    x = 7,281,740,077.05/81,676.17
  6. Step 6: Final answer
    x = 89,153.79

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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.