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Finding the Fourth Proportional to 66,688.01, 92,028.55 and 38,009.38

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Solution

The fourth proportional to 66,688.01, 92,028.55 and 38,009.38 is: 52,452.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,688.01 : 92,028.55 = 38,009.38 : x
  2. Step 2: Convert to fraction form
    66,688.01/92,028.55 = 38,009.38/x
  3. Step 3: Cross multiply
    66,688.01x = 92,028.55 × 38,009.38
  4. Step 4: Simplify right side
    66,688.01x = 3,497,948,127.80
  5. Step 5: Solve for x
    x = 3,497,948,127.80/66,688.01
  6. Step 6: Final answer
    x = 52,452.43

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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.