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Finding the Fourth Proportional to 66,777.94, 92,126.55 and 39,905.11

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Solution

The fourth proportional to 66,777.94, 92,126.55 and 39,905.11 is: 55,052.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,777.94 : 92,126.55 = 39,905.11 : x
  2. Step 2: Convert to fraction form
    66,777.94/92,126.55 = 39,905.11/x
  3. Step 3: Cross multiply
    66,777.94x = 92,126.55 × 39,905.11
  4. Step 4: Simplify right side
    66,777.94x = 3,676,320,111.67
  5. Step 5: Solve for x
    x = 3,676,320,111.67/66,777.94
  6. Step 6: Final answer
    x = 55,052.91

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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.