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Finding the Fourth Proportional to 66,902, 92,327.64 and 40,039.40

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Solution

The fourth proportional to 66,902, 92,327.64 and 40,039.40 is: 55,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,902 : 92,327.64 = 40,039.40 : x
  2. Step 2: Convert to fraction form
    66,902/92,327.64 = 40,039.40/x
  3. Step 3: Cross multiply
    66,902x = 92,327.64 × 40,039.40
  4. Step 4: Simplify right side
    66,902x = 3,696,743,309.02
  5. Step 5: Solve for x
    x = 3,696,743,309.02/66,902
  6. Step 6: Final answer
    x = 55,256.10

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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.