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Finding the Fourth Proportional to 67,475, 101,212.50 and 20,727.88

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Solution

The fourth proportional to 67,475, 101,212.50 and 20,727.88 is: 31,091.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,475 : 101,212.50 = 20,727.88 : x
  2. Step 2: Convert to fraction form
    67,475/101,212.50 = 20,727.88/x
  3. Step 3: Cross multiply
    67,475x = 101,212.50 × 20,727.88
  4. Step 4: Simplify right side
    67,475x = 2,097,920,554.50
  5. Step 5: Solve for x
    x = 2,097,920,554.50/67,475
  6. Step 6: Final answer
    x = 31,091.82

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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.