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Finding the Fourth Proportional to 318,986,235.46, 478,479,353.46 and 76,649,139.46

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Solution

The fourth proportional to 318,986,235.46, 478,479,353.46 and 76,649,139.46 is: 114,973,709.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,986,235.46 : 478,479,353.46 = 76,649,139.46 : x
  2. Step 2: Convert to fraction form
    318,986,235.46/478,479,353.46 = 76,649,139.46/x
  3. Step 3: Cross multiply
    318,986,235.46x = 478,479,353.46 × 76,649,139.46
  4. Step 4: Simplify right side
    318,986,235.46x = 36,675,030,692,086,168
  5. Step 5: Solve for x
    x = 36,675,030,692,086,168/318,986,235.46
  6. Step 6: Final answer
    x = 114,973,709.25

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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.