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Finding the Fourth Proportional to 139,946.61, 209,960.82 and 45,174.58

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Solution

The fourth proportional to 139,946.61, 209,960.82 and 45,174.58 is: 67,775.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,946.61 : 209,960.82 = 45,174.58 : x
  2. Step 2: Convert to fraction form
    139,946.61/209,960.82 = 45,174.58/x
  3. Step 3: Cross multiply
    139,946.61x = 209,960.82 × 45,174.58
  4. Step 4: Simplify right side
    139,946.61x = 9,484,891,859.96
  5. Step 5: Solve for x
    x = 9,484,891,859.96/139,946.61
  6. Step 6: Final answer
    x = 67,775.07

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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.