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Finding the Fourth Proportional to 70,641.41, 105,962.69 and 20,722.32

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Solution

The fourth proportional to 70,641.41, 105,962.69 and 20,722.32 is: 31,083.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,641.41 : 105,962.69 = 20,722.32 : x
  2. Step 2: Convert to fraction form
    70,641.41/105,962.69 = 20,722.32/x
  3. Step 3: Cross multiply
    70,641.41x = 105,962.69 × 20,722.32
  4. Step 4: Simplify right side
    70,641.41x = 2,195,792,822.05
  5. Step 5: Solve for x
    x = 2,195,792,822.05/70,641.41
  6. Step 6: Final answer
    x = 31,083.65

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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.