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Finding the Fourth Proportional to 108,099.60, 149,134.56 and 72,232.80

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Solution

The fourth proportional to 108,099.60, 149,134.56 and 72,232.80 is: 99,652.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,099.60 : 149,134.56 = 72,232.80 : x
  2. Step 2: Convert to fraction form
    108,099.60/149,134.56 = 72,232.80/x
  3. Step 3: Cross multiply
    108,099.60x = 149,134.56 × 72,232.80
  4. Step 4: Simplify right side
    108,099.60x = 10,772,406,845.57
  5. Step 5: Solve for x
    x = 10,772,406,845.57/108,099.60
  6. Step 6: Final answer
    x = 99,652.61

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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.