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Finding the Fourth Proportional to 108,554.67, 149,856.75 and 72,768.06

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Solution

The fourth proportional to 108,554.67, 149,856.75 and 72,768.06 is: 100,454.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,554.67 : 149,856.75 = 72,768.06 : x
  2. Step 2: Convert to fraction form
    108,554.67/149,856.75 = 72,768.06/x
  3. Step 3: Cross multiply
    108,554.67x = 149,856.75 × 72,768.06
  4. Step 4: Simplify right side
    108,554.67x = 10,904,784,975.41
  5. Step 5: Solve for x
    x = 10,904,784,975.41/108,554.67
  6. Step 6: Final answer
    x = 100,454.31

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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.