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Finding the Fourth Proportional to 117,317.16, 161,883.90 and 69,561.72

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Solution

The fourth proportional to 117,317.16, 161,883.90 and 69,561.72 is: 95,987.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,317.16 : 161,883.90 = 69,561.72 : x
  2. Step 2: Convert to fraction form
    117,317.16/161,883.90 = 69,561.72/x
  3. Step 3: Cross multiply
    117,317.16x = 161,883.90 × 69,561.72
  4. Step 4: Simplify right side
    117,317.16x = 11,260,922,524.31
  5. Step 5: Solve for x
    x = 11,260,922,524.31/117,317.16
  6. Step 6: Final answer
    x = 95,987.00

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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.