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Finding the Fourth Proportional to 67,315.32, 100,972.98 and 20,567.79

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Solution

The fourth proportional to 67,315.32, 100,972.98 and 20,567.79 is: 30,851.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,315.32 : 100,972.98 = 20,567.79 : x
  2. Step 2: Convert to fraction form
    67,315.32/100,972.98 = 20,567.79/x
  3. Step 3: Cross multiply
    67,315.32x = 100,972.98 × 20,567.79
  4. Step 4: Simplify right side
    67,315.32x = 2,076,791,048.31
  5. Step 5: Solve for x
    x = 2,076,791,048.31/67,315.32
  6. Step 6: Final answer
    x = 30,851.69

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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.