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Finding the Fourth Proportional to 66,385.44, 91,566.32 and 39,507.21

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Solution

The fourth proportional to 66,385.44, 91,566.32 and 39,507.21 is: 54,492.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,385.44 : 91,566.32 = 39,507.21 : x
  2. Step 2: Convert to fraction form
    66,385.44/91,566.32 = 39,507.21/x
  3. Step 3: Cross multiply
    66,385.44x = 91,566.32 × 39,507.21
  4. Step 4: Simplify right side
    66,385.44x = 3,617,529,635.63
  5. Step 5: Solve for x
    x = 3,617,529,635.63/66,385.44
  6. Step 6: Final answer
    x = 54,492.82

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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.