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Finding the Fourth Proportional to 207,122.40, 310,683.60 and 66,895.20

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Solution

The fourth proportional to 207,122.40, 310,683.60 and 66,895.20 is: 100,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,122.40 : 310,683.60 = 66,895.20 : x
  2. Step 2: Convert to fraction form
    207,122.40/310,683.60 = 66,895.20/x
  3. Step 3: Cross multiply
    207,122.40x = 310,683.60 × 66,895.20
  4. Step 4: Simplify right side
    207,122.40x = 20,783,241,558.72
  5. Step 5: Solve for x
    x = 20,783,241,558.72/207,122.40
  6. Step 6: Final answer
    x = 100,342.80

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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.