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Finding the Fourth Proportional to 61,228.40, 91,842.28 and 21,786.96

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Solution

The fourth proportional to 61,228.40, 91,842.28 and 21,786.96 is: 32,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,228.40 : 91,842.28 = 21,786.96 : x
  2. Step 2: Convert to fraction form
    61,228.40/91,842.28 = 21,786.96/x
  3. Step 3: Cross multiply
    61,228.40x = 91,842.28 × 21,786.96
  4. Step 4: Simplify right side
    61,228.40x = 2,000,964,080.67
  5. Step 5: Solve for x
    x = 2,000,964,080.67/61,228.40
  6. Step 6: Final answer
    x = 32,680.33

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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.