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Finding the Fourth Proportional to 108,459.15, 162,524.70 and 91,728.60

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Solution

The fourth proportional to 108,459.15, 162,524.70 and 91,728.60 is: 137,454.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,459.15 : 162,524.70 = 91,728.60 : x
  2. Step 2: Convert to fraction form
    108,459.15/162,524.70 = 91,728.60/x
  3. Step 3: Cross multiply
    108,459.15x = 162,524.70 × 91,728.60
  4. Step 4: Simplify right side
    108,459.15x = 14,908,163,196.42
  5. Step 5: Solve for x
    x = 14,908,163,196.42/108,459.15
  6. Step 6: Final answer
    x = 137,454.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.