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Finding the Fourth Proportional to 108,236.54, 149,431.02 and 67,984.80

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Solution

The fourth proportional to 108,236.54, 149,431.02 and 67,984.80 is: 93,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,236.54 : 149,431.02 = 67,984.80 : x
  2. Step 2: Convert to fraction form
    108,236.54/149,431.02 = 67,984.80/x
  3. Step 3: Cross multiply
    108,236.54x = 149,431.02 × 67,984.80
  4. Step 4: Simplify right side
    108,236.54x = 10,159,038,008.50
  5. Step 5: Solve for x
    x = 10,159,038,008.50/108,236.54
  6. Step 6: Final answer
    x = 93,859.60

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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.