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Finding the Fourth Proportional to 66,779.50, 100,179.11 and 19,394.95

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Solution

The fourth proportional to 66,779.50, 100,179.11 and 19,394.95 is: 29,095.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,779.50 : 100,179.11 = 19,394.95 : x
  2. Step 2: Convert to fraction form
    66,779.50/100,179.11 = 19,394.95/x
  3. Step 3: Cross multiply
    66,779.50x = 100,179.11 × 19,394.95
  4. Step 4: Simplify right side
    66,779.50x = 1,942,968,829.49
  5. Step 5: Solve for x
    x = 1,942,968,829.49/66,779.50
  6. Step 6: Final answer
    x = 29,095.29

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1.5x scale

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.