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Finding the Fourth Proportional to 117,168.75, 161,770.64 and 72,534.51

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Solution

The fourth proportional to 117,168.75, 161,770.64 and 72,534.51 is: 100,145.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,168.75 : 161,770.64 = 72,534.51 : x
  2. Step 2: Convert to fraction form
    117,168.75/161,770.64 = 72,534.51/x
  3. Step 3: Cross multiply
    117,168.75x = 161,770.64 × 72,534.51
  4. Step 4: Simplify right side
    117,168.75x = 11,733,953,742.11
  5. Step 5: Solve for x
    x = 11,733,953,742.11/117,168.75
  6. Step 6: Final answer
    x = 100,145.76

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1.5x scale

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.