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Finding the Fourth Proportional to 74,728, 103,126.80 and 41,196.16

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Solution

The fourth proportional to 74,728, 103,126.80 and 41,196.16 is: 56,851.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,728 : 103,126.80 = 41,196.16 : x
  2. Step 2: Convert to fraction form
    74,728/103,126.80 = 41,196.16/x
  3. Step 3: Cross multiply
    74,728x = 103,126.80 × 41,196.16
  4. Step 4: Simplify right side
    74,728x = 4,248,428,153.09
  5. Step 5: Solve for x
    x = 4,248,428,153.09/74,728
  6. Step 6: Final answer
    x = 56,851.89

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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.