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Finding the Fourth Proportional to 148,712.68, 205,216.48 and 80,728.12

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Solution

The fourth proportional to 148,712.68, 205,216.48 and 80,728.12 is: 111,401.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,712.68 : 205,216.48 = 80,728.12 : x
  2. Step 2: Convert to fraction form
    148,712.68/205,216.48 = 80,728.12/x
  3. Step 3: Cross multiply
    148,712.68x = 205,216.48 × 80,728.12
  4. Step 4: Simplify right side
    148,712.68x = 16,566,740,623.42
  5. Step 5: Solve for x
    x = 16,566,740,623.42/148,712.68
  6. Step 6: Final answer
    x = 111,401.00

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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.