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Finding the Fourth Proportional to 345,779.88, 518,651.46 and 105,893.70

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Solution

The fourth proportional to 345,779.88, 518,651.46 and 105,893.70 is: 158,834.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,779.88 : 518,651.46 = 105,893.70 : x
  2. Step 2: Convert to fraction form
    345,779.88/518,651.46 = 105,893.70/x
  3. Step 3: Cross multiply
    345,779.88x = 518,651.46 × 105,893.70
  4. Step 4: Simplify right side
    345,779.88x = 54,921,922,109.80
  5. Step 5: Solve for x
    x = 54,921,922,109.80/345,779.88
  6. Step 6: Final answer
    x = 158,834.93

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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.