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Finding the Fourth Proportional to 66,725.61, 92,078.64 and 39,882.93

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Solution

The fourth proportional to 66,725.61, 92,078.64 and 39,882.93 is: 55,036.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,725.61 : 92,078.64 = 39,882.93 : x
  2. Step 2: Convert to fraction form
    66,725.61/92,078.64 = 39,882.93/x
  3. Step 3: Cross multiply
    66,725.61x = 92,078.64 × 39,882.93
  4. Step 4: Simplify right side
    66,725.61x = 3,672,365,953.62
  5. Step 5: Solve for x
    x = 3,672,365,953.62/66,725.61
  6. Step 6: Final answer
    x = 55,036.83

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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.