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Finding the Fourth Proportional to 162,916.70, 244,265.70 and 78,717.20

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Solution

The fourth proportional to 162,916.70, 244,265.70 and 78,717.20 is: 118,022.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,916.70 : 244,265.70 = 78,717.20 : x
  2. Step 2: Convert to fraction form
    162,916.70/244,265.70 = 78,717.20/x
  3. Step 3: Cross multiply
    162,916.70x = 244,265.70 × 78,717.20
  4. Step 4: Simplify right side
    162,916.70x = 19,227,911,960.04
  5. Step 5: Solve for x
    x = 19,227,911,960.04/162,916.70
  6. Step 6: Final answer
    x = 118,022.96

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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.