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Finding the Fourth Proportional to 121,765.37, 168,108.87 and 76,482.11

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Solution

The fourth proportional to 121,765.37, 168,108.87 and 76,482.11 is: 105,590.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,765.37 : 168,108.87 = 76,482.11 : x
  2. Step 2: Convert to fraction form
    121,765.37/168,108.87 = 76,482.11/x
  3. Step 3: Cross multiply
    121,765.37x = 168,108.87 × 76,482.11
  4. Step 4: Simplify right side
    121,765.37x = 12,857,320,246.77
  5. Step 5: Solve for x
    x = 12,857,320,246.77/121,765.37
  6. Step 6: Final answer
    x = 105,590.95

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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.