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Finding the Fourth Proportional to 66,408.75, 91,644.48 and 38,114.64

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Solution

The fourth proportional to 66,408.75, 91,644.48 and 38,114.64 is: 52,598.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.75 : 91,644.48 = 38,114.64 : x
  2. Step 2: Convert to fraction form
    66,408.75/91,644.48 = 38,114.64/x
  3. Step 3: Cross multiply
    66,408.75x = 91,644.48 × 38,114.64
  4. Step 4: Simplify right side
    66,408.75x = 3,492,996,363.19
  5. Step 5: Solve for x
    x = 3,492,996,363.19/66,408.75
  6. Step 6: Final answer
    x = 52,598.44

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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.