Home / 74,135.64-102,307-40,144.16

Finding the Fourth Proportional to 74,135.64, 102,307 and 40,144.16

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Solution

The fourth proportional to 74,135.64, 102,307 and 40,144.16 is: 55,398.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,135.64 : 102,307 = 40,144.16 : x
  2. Step 2: Convert to fraction form
    74,135.64/102,307 = 40,144.16/x
  3. Step 3: Cross multiply
    74,135.64x = 102,307 × 40,144.16
  4. Step 4: Simplify right side
    74,135.64x = 4,107,028,577.12
  5. Step 5: Solve for x
    x = 4,107,028,577.12/74,135.64
  6. Step 6: Final answer
    x = 55,398.84

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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.