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Finding the Fourth Proportional to 84,009.39, 116,080.49 and 67,152.78

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Solution

The fourth proportional to 84,009.39, 116,080.49 and 67,152.78 is: 92,788.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,009.39 : 116,080.49 = 67,152.78 : x
  2. Step 2: Convert to fraction form
    84,009.39/116,080.49 = 67,152.78/x
  3. Step 3: Cross multiply
    84,009.39x = 116,080.49 × 67,152.78
  4. Step 4: Simplify right side
    84,009.39x = 7,795,127,775.14
  5. Step 5: Solve for x
    x = 7,795,127,775.14/84,009.39
  6. Step 6: Final answer
    x = 92,788.77

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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.