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Finding the Fourth Proportional to 108,459.68, 149,728.70 and 68,195.59

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Solution

The fourth proportional to 108,459.68, 149,728.70 and 68,195.59 is: 94,144.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,459.68 : 149,728.70 = 68,195.59 : x
  2. Step 2: Convert to fraction form
    108,459.68/149,728.70 = 68,195.59/x
  3. Step 3: Cross multiply
    108,459.68x = 149,728.70 × 68,195.59
  4. Step 4: Simplify right side
    108,459.68x = 10,210,836,832.60
  5. Step 5: Solve for x
    x = 10,210,836,832.60/108,459.68
  6. Step 6: Final answer
    x = 94,144.08

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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.