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Finding the Fourth Proportional to 66,768.91, 92,140.95 and 39,910.12

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Solution

The fourth proportional to 66,768.91, 92,140.95 and 39,910.12 is: 55,075.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,768.91 : 92,140.95 = 39,910.12 : x
  2. Step 2: Convert to fraction form
    66,768.91/92,140.95 = 39,910.12/x
  3. Step 3: Cross multiply
    66,768.91x = 92,140.95 × 39,910.12
  4. Step 4: Simplify right side
    66,768.91x = 3,677,356,371.41
  5. Step 5: Solve for x
    x = 3,677,356,371.41/66,768.91
  6. Step 6: Final answer
    x = 55,075.88

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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.