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Finding the Fourth Proportional to 121,318.88, 167,420.72 and 70,361.81

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Solution

The fourth proportional to 121,318.88, 167,420.72 and 70,361.81 is: 97,099.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,318.88 : 167,420.72 = 70,361.81 : x
  2. Step 2: Convert to fraction form
    121,318.88/167,420.72 = 70,361.81/x
  3. Step 3: Cross multiply
    121,318.88x = 167,420.72 × 70,361.81
  4. Step 4: Simplify right side
    121,318.88x = 11,780,024,957.45
  5. Step 5: Solve for x
    x = 11,780,024,957.45/121,318.88
  6. Step 6: Final answer
    x = 97,099.68

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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.