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Finding the Fourth Proportional to 318,006.98, 477,005.61 and 81,347.66

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Solution

The fourth proportional to 318,006.98, 477,005.61 and 81,347.66 is: 122,020.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,006.98 : 477,005.61 = 81,347.66 : x
  2. Step 2: Convert to fraction form
    318,006.98/477,005.61 = 81,347.66/x
  3. Step 3: Cross multiply
    318,006.98x = 477,005.61 × 81,347.66
  4. Step 4: Simplify right side
    318,006.98x = 38,803,290,180.37
  5. Step 5: Solve for x
    x = 38,803,290,180.37/318,006.98
  6. Step 6: Final answer
    x = 122,020.25

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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.