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Finding the Fourth Proportional to 66,906, 92,344.68 and 40,054.50

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Solution

The fourth proportional to 66,906, 92,344.68 and 40,054.50 is: 55,283.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,906 : 92,344.68 = 40,054.50 : x
  2. Step 2: Convert to fraction form
    66,906/92,344.68 = 40,054.50/x
  3. Step 3: Cross multiply
    66,906x = 92,344.68 × 40,054.50
  4. Step 4: Simplify right side
    66,906x = 3,698,819,985.06
  5. Step 5: Solve for x
    x = 3,698,819,985.06/66,906
  6. Step 6: Final answer
    x = 55,283.83

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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.