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Finding the Fourth Proportional to 122,363.76, 168,934.36 and 77,080.56

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Solution

The fourth proportional to 122,363.76, 168,934.36 and 77,080.56 is: 106,416.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,363.76 : 168,934.36 = 77,080.56 : x
  2. Step 2: Convert to fraction form
    122,363.76/168,934.36 = 77,080.56/x
  3. Step 3: Cross multiply
    122,363.76x = 168,934.36 × 77,080.56
  4. Step 4: Simplify right side
    122,363.76x = 13,021,555,072.04
  5. Step 5: Solve for x
    x = 13,021,555,072.04/122,363.76
  6. Step 6: Final answer
    x = 106,416.76

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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.