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Finding the Fourth Proportional to 125,118.72, 172,606.08 and 72,096

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Solution

The fourth proportional to 125,118.72, 172,606.08 and 72,096 is: 99,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,118.72 : 172,606.08 = 72,096 : x
  2. Step 2: Convert to fraction form
    125,118.72/172,606.08 = 72,096/x
  3. Step 3: Cross multiply
    125,118.72x = 172,606.08 × 72,096
  4. Step 4: Simplify right side
    125,118.72x = 12,444,207,943.68
  5. Step 5: Solve for x
    x = 12,444,207,943.68/125,118.72
  6. Step 6: Final answer
    x = 99,459.20

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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.