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Finding the Fourth Proportional to 339,783.60, 509,675.40 and 103,125.90

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Solution

The fourth proportional to 339,783.60, 509,675.40 and 103,125.90 is: 154,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,783.60 : 509,675.40 = 103,125.90 : x
  2. Step 2: Convert to fraction form
    339,783.60/509,675.40 = 103,125.90/x
  3. Step 3: Cross multiply
    339,783.60x = 509,675.40 × 103,125.90
  4. Step 4: Simplify right side
    339,783.60x = 52,560,734,332.86
  5. Step 5: Solve for x
    x = 52,560,734,332.86/339,783.60
  6. Step 6: Final answer
    x = 154,688.85

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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.