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Finding the Fourth Proportional to 81,995.10, 122,992.65 and 52,446.30

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Solution

The fourth proportional to 81,995.10, 122,992.65 and 52,446.30 is: 78,669.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,995.10 : 122,992.65 = 52,446.30 : x
  2. Step 2: Convert to fraction form
    81,995.10/122,992.65 = 52,446.30/x
  3. Step 3: Cross multiply
    81,995.10x = 122,992.65 × 52,446.30
  4. Step 4: Simplify right side
    81,995.10x = 6,450,509,419.70
  5. Step 5: Solve for x
    x = 6,450,509,419.70/81,995.10
  6. Step 6: Final answer
    x = 78,669.45

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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.