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Finding the Fourth Proportional to 206,697.60, 310,099.20 and 66,457.60

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Solution

The fourth proportional to 206,697.60, 310,099.20 and 66,457.60 is: 99,703.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,697.60 : 310,099.20 = 66,457.60 : x
  2. Step 2: Convert to fraction form
    206,697.60/310,099.20 = 66,457.60/x
  3. Step 3: Cross multiply
    206,697.60x = 310,099.20 × 66,457.60
  4. Step 4: Simplify right side
    206,697.60x = 20,608,448,593.92
  5. Step 5: Solve for x
    x = 20,608,448,593.92/206,697.60
  6. Step 6: Final answer
    x = 99,703.38

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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.