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Finding the Fourth Proportional to 67,215.65, 100,823.47 and 20,468.93

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Solution

The fourth proportional to 67,215.65, 100,823.47 and 20,468.93 is: 30,703.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,215.65 : 100,823.47 = 20,468.93 : x
  2. Step 2: Convert to fraction form
    67,215.65/100,823.47 = 20,468.93/x
  3. Step 3: Cross multiply
    67,215.65x = 100,823.47 × 20,468.93
  4. Step 4: Simplify right side
    67,215.65x = 2,063,747,994.50
  5. Step 5: Solve for x
    x = 2,063,747,994.50/67,215.65
  6. Step 6: Final answer
    x = 30,703.39

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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.