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Finding the Fourth Proportional to 339,833.99, 509,718.08 and 103,178.72

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Solution

The fourth proportional to 339,833.99, 509,718.08 and 103,178.72 is: 154,758.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,833.99 : 509,718.08 = 103,178.72 : x
  2. Step 2: Convert to fraction form
    339,833.99/509,718.08 = 103,178.72/x
  3. Step 3: Cross multiply
    339,833.99x = 509,718.08 × 103,178.72
  4. Step 4: Simplify right side
    339,833.99x = 52,592,060,587.50
  5. Step 5: Solve for x
    x = 52,592,060,587.50/339,833.99
  6. Step 6: Final answer
    x = 154,758.09

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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.