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Finding the Fourth Proportional to 66,903.60, 92,313.90 and 39,674.64

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Solution

The fourth proportional to 66,903.60, 92,313.90 and 39,674.64 is: 54,743.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,903.60 : 92,313.90 = 39,674.64 : x
  2. Step 2: Convert to fraction form
    66,903.60/92,313.90 = 39,674.64/x
  3. Step 3: Cross multiply
    66,903.60x = 92,313.90 × 39,674.64
  4. Step 4: Simplify right side
    66,903.60x = 3,662,520,749.50
  5. Step 5: Solve for x
    x = 3,662,520,749.50/66,903.60
  6. Step 6: Final answer
    x = 54,743.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.