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Finding the Fourth Proportional to 66,733.69, 92,083.38 and 39,870.49

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Solution

The fourth proportional to 66,733.69, 92,083.38 and 39,870.49 is: 55,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,733.69 : 92,083.38 = 39,870.49 : x
  2. Step 2: Convert to fraction form
    66,733.69/92,083.38 = 39,870.49/x
  3. Step 3: Cross multiply
    66,733.69x = 92,083.38 × 39,870.49
  4. Step 4: Simplify right side
    66,733.69x = 3,671,409,481.46
  5. Step 5: Solve for x
    x = 3,671,409,481.46/66,733.69
  6. Step 6: Final answer
    x = 55,015.83

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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.