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Finding the Fourth Proportional to 74,805.15, 112,076.22 and 66,669.51

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Solution

The fourth proportional to 74,805.15, 112,076.22 and 66,669.51 is: 99,887.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,805.15 : 112,076.22 = 66,669.51 : x
  2. Step 2: Convert to fraction form
    74,805.15/112,076.22 = 66,669.51/x
  3. Step 3: Cross multiply
    74,805.15x = 112,076.22 × 66,669.51
  4. Step 4: Simplify right side
    74,805.15x = 7,472,066,670.05
  5. Step 5: Solve for x
    x = 7,472,066,670.05/74,805.15
  6. Step 6: Final answer
    x = 99,887.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.