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Finding the Fourth Proportional to 194,139.72, 291,342.58 and 67,779.98

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Solution

The fourth proportional to 194,139.72, 291,342.58 and 67,779.98 is: 101,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,139.72 : 291,342.58 = 67,779.98 : x
  2. Step 2: Convert to fraction form
    194,139.72/291,342.58 = 67,779.98/x
  3. Step 3: Cross multiply
    194,139.72x = 291,342.58 × 67,779.98
  4. Step 4: Simplify right side
    194,139.72x = 19,747,193,711.92
  5. Step 5: Solve for x
    x = 19,747,193,711.92/194,139.72
  6. Step 6: Final answer
    x = 101,716.40

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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.