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Finding the Fourth Proportional to 318,008.98, 477,008.61 and 81,349.66

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Solution

The fourth proportional to 318,008.98, 477,008.61 and 81,349.66 is: 122,023.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,008.98 : 477,008.61 = 81,349.66 : x
  2. Step 2: Convert to fraction form
    318,008.98/477,008.61 = 81,349.66/x
  3. Step 3: Cross multiply
    318,008.98x = 477,008.61 × 81,349.66
  4. Step 4: Simplify right side
    318,008.98x = 38,804,488,240.57
  5. Step 5: Solve for x
    x = 38,804,488,240.57/318,008.98
  6. Step 6: Final answer
    x = 122,023.25

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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.