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Finding the Fourth Proportional to 148,703.68, 205,204.08 and 80,719.12

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Solution

The fourth proportional to 148,703.68, 205,204.08 and 80,719.12 is: 111,388.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,703.68 : 205,204.08 = 80,719.12 : x
  2. Step 2: Convert to fraction form
    148,703.68/205,204.08 = 80,719.12/x
  3. Step 3: Cross multiply
    148,703.68x = 205,204.08 × 80,719.12
  4. Step 4: Simplify right side
    148,703.68x = 16,563,892,758.01
  5. Step 5: Solve for x
    x = 16,563,892,758.01/148,703.68
  6. Step 6: Final answer
    x = 111,388.59

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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.