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Finding the Fourth Proportional to 208,457.38, 312,682.76 and 66,300.60

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Solution

The fourth proportional to 208,457.38, 312,682.76 and 66,300.60 is: 99,449.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,457.38 : 312,682.76 = 66,300.60 : x
  2. Step 2: Convert to fraction form
    208,457.38/312,682.76 = 66,300.60/x
  3. Step 3: Cross multiply
    208,457.38x = 312,682.76 × 66,300.60
  4. Step 4: Simplify right side
    208,457.38x = 20,731,054,266.15
  5. Step 5: Solve for x
    x = 20,731,054,266.15/208,457.38
  6. Step 6: Final answer
    x = 99,449.85

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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.