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Finding the Fourth Proportional to 318,855.63, 478,117.38 and 119,011.68

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Solution

The fourth proportional to 318,855.63, 478,117.38 and 119,011.68 is: 178,455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,855.63 : 478,117.38 = 119,011.68 : x
  2. Step 2: Convert to fraction form
    318,855.63/478,117.38 = 119,011.68/x
  3. Step 3: Cross multiply
    318,855.63x = 478,117.38 × 119,011.68
  4. Step 4: Simplify right side
    318,855.63x = 56,901,552,631.00
  5. Step 5: Solve for x
    x = 56,901,552,631.00/318,855.63
  6. Step 6: Final answer
    x = 178,455.54

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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.