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Finding the Fourth Proportional to 318,766.08, 478,212.22 and 91,063.66

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Solution

The fourth proportional to 318,766.08, 478,212.22 and 91,063.66 is: 136,613.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,766.08 : 478,212.22 = 91,063.66 : x
  2. Step 2: Convert to fraction form
    318,766.08/478,212.22 = 91,063.66/x
  3. Step 3: Cross multiply
    318,766.08x = 478,212.22 × 91,063.66
  4. Step 4: Simplify right side
    318,766.08x = 43,547,755,977.80
  5. Step 5: Solve for x
    x = 43,547,755,977.80/318,766.08
  6. Step 6: Final answer
    x = 136,613.52

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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.