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Finding the Fourth Proportional to 210,429.85, 315,841.60 and 103,934.06

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Solution

The fourth proportional to 210,429.85, 315,841.60 and 103,934.06 is: 155,998.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,429.85 : 315,841.60 = 103,934.06 : x
  2. Step 2: Convert to fraction form
    210,429.85/315,841.60 = 103,934.06/x
  3. Step 3: Cross multiply
    210,429.85x = 315,841.60 × 103,934.06
  4. Step 4: Simplify right side
    210,429.85x = 32,826,700,720.63
  5. Step 5: Solve for x
    x = 32,826,700,720.63/210,429.85
  6. Step 6: Final answer
    x = 155,998.31

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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.