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Finding the Fourth Proportional to 78,363.70, 108,159.12 and 51,508.70

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Solution

The fourth proportional to 78,363.70, 108,159.12 and 51,508.70 is: 71,093.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,363.70 : 108,159.12 = 51,508.70 : x
  2. Step 2: Convert to fraction form
    78,363.70/108,159.12 = 51,508.70/x
  3. Step 3: Cross multiply
    78,363.70x = 108,159.12 × 51,508.70
  4. Step 4: Simplify right side
    78,363.70x = 5,571,135,934.74
  5. Step 5: Solve for x
    x = 5,571,135,934.74/78,363.70
  6. Step 6: Final answer
    x = 71,093.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.