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Finding the Fourth Proportional to 84,611.84, 126,779.31 and 51,230.79

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Solution

The fourth proportional to 84,611.84, 126,779.31 and 51,230.79 is: 76,762.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,611.84 : 126,779.31 = 51,230.79 : x
  2. Step 2: Convert to fraction form
    84,611.84/126,779.31 = 51,230.79/x
  3. Step 3: Cross multiply
    84,611.84x = 126,779.31 × 51,230.79
  4. Step 4: Simplify right side
    84,611.84x = 6,495,004,206.95
  5. Step 5: Solve for x
    x = 6,495,004,206.95/84,611.84
  6. Step 6: Final answer
    x = 76,762.36

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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.