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Finding the Fourth Proportional to 67,008.60, 100,512.90 and 65,971.80

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Solution

The fourth proportional to 67,008.60, 100,512.90 and 65,971.80 is: 98,957.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,008.60 : 100,512.90 = 65,971.80 : x
  2. Step 2: Convert to fraction form
    67,008.60/100,512.90 = 65,971.80/x
  3. Step 3: Cross multiply
    67,008.60x = 100,512.90 × 65,971.80
  4. Step 4: Simplify right side
    67,008.60x = 6,631,016,936.22
  5. Step 5: Solve for x
    x = 6,631,016,936.22/67,008.60
  6. Step 6: Final answer
    x = 98,957.70

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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.