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Finding the Fourth Proportional to 78,363.96, 117,545.96 and 28,443.96

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Solution

The fourth proportional to 78,363.96, 117,545.96 and 28,443.96 is: 42,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,363.96 : 117,545.96 = 28,443.96 : x
  2. Step 2: Convert to fraction form
    78,363.96/117,545.96 = 28,443.96/x
  3. Step 3: Cross multiply
    78,363.96x = 117,545.96 × 28,443.96
  4. Step 4: Simplify right side
    78,363.96x = 3,343,472,584.40
  5. Step 5: Solve for x
    x = 3,343,472,584.40/78,363.96
  6. Step 6: Final answer
    x = 42,665.95

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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.