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Finding the Fourth Proportional to 66,878.57, 92,296.19 and 39,670.79

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Solution

The fourth proportional to 66,878.57, 92,296.19 and 39,670.79 is: 54,747.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,878.57 : 92,296.19 = 39,670.79 : x
  2. Step 2: Convert to fraction form
    66,878.57/92,296.19 = 39,670.79/x
  3. Step 3: Cross multiply
    66,878.57x = 92,296.19 × 39,670.79
  4. Step 4: Simplify right side
    66,878.57x = 3,661,462,185.84
  5. Step 5: Solve for x
    x = 3,661,462,185.84/66,878.57
  6. Step 6: Final answer
    x = 54,747.92

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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.