Home / 318,926.76-478,378.18-79,041.45

Finding the Fourth Proportional to 318,926.76, 478,378.18 and 79,041.45

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Solution

The fourth proportional to 318,926.76, 478,378.18 and 79,041.45 is: 118,559.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,926.76 : 478,378.18 = 79,041.45 : x
  2. Step 2: Convert to fraction form
    318,926.76/478,378.18 = 79,041.45/x
  3. Step 3: Cross multiply
    318,926.76x = 478,378.18 × 79,041.45
  4. Step 4: Simplify right side
    318,926.76x = 37,811,704,600.35
  5. Step 5: Solve for x
    x = 37,811,704,600.35/318,926.76
  6. Step 6: Final answer
    x = 118,559.21

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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.