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Finding the Fourth Proportional to 318,841.43, 478,248.30 and 119,163.53

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Solution

The fourth proportional to 318,841.43, 478,248.30 and 119,163.53 is: 178,740.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,841.43 : 478,248.30 = 119,163.53 : x
  2. Step 2: Convert to fraction form
    318,841.43/478,248.30 = 119,163.53/x
  3. Step 3: Cross multiply
    318,841.43x = 478,248.30 × 119,163.53
  4. Step 4: Simplify right side
    318,841.43x = 56,989,756,840.12
  5. Step 5: Solve for x
    x = 56,989,756,840.12/318,841.43
  6. Step 6: Final answer
    x = 178,740.13

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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.