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Finding the Fourth Proportional to 475,639.45, 713,472.17 and 138,671.96

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Solution

The fourth proportional to 475,639.45, 713,472.17 and 138,671.96 is: 208,011.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,639.45 : 713,472.17 = 138,671.96 : x
  2. Step 2: Convert to fraction form
    475,639.45/713,472.17 = 138,671.96/x
  3. Step 3: Cross multiply
    475,639.45x = 713,472.17 × 138,671.96
  4. Step 4: Simplify right side
    475,639.45x = 98,938,583,971.91
  5. Step 5: Solve for x
    x = 98,938,583,971.91/475,639.45
  6. Step 6: Final answer
    x = 208,011.73

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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.