Home / 53,639.08-74,028.48-30,978

Finding the Fourth Proportional to 53,639.08, 74,028.48 and 30,978

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Solution

The fourth proportional to 53,639.08, 74,028.48 and 30,978 is: 42,753.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,639.08 : 74,028.48 = 30,978 : x
  2. Step 2: Convert to fraction form
    53,639.08/74,028.48 = 30,978/x
  3. Step 3: Cross multiply
    53,639.08x = 74,028.48 × 30,978
  4. Step 4: Simplify right side
    53,639.08x = 2,293,254,253.44
  5. Step 5: Solve for x
    x = 2,293,254,253.44/53,639.08
  6. Step 6: Final answer
    x = 42,753.42

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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.