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Finding the Fourth Proportional to 279,957.86, 419,938.35 and 69,595.79

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Solution

The fourth proportional to 279,957.86, 419,938.35 and 69,595.79 is: 104,394.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,957.86 : 419,938.35 = 69,595.79 : x
  2. Step 2: Convert to fraction form
    279,957.86/419,938.35 = 69,595.79/x
  3. Step 3: Cross multiply
    279,957.86x = 419,938.35 × 69,595.79
  4. Step 4: Simplify right side
    279,957.86x = 29,225,939,119.85
  5. Step 5: Solve for x
    x = 29,225,939,119.85/279,957.86
  6. Step 6: Final answer
    x = 104,394.07

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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.