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Finding the Fourth Proportional to 84,957.60, 127,419.36 and 80,742.36

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Solution

The fourth proportional to 84,957.60, 127,419.36 and 80,742.36 is: 121,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,957.60 : 127,419.36 = 80,742.36 : x
  2. Step 2: Convert to fraction form
    84,957.60/127,419.36 = 80,742.36/x
  3. Step 3: Cross multiply
    84,957.60x = 127,419.36 × 80,742.36
  4. Step 4: Simplify right side
    84,957.60x = 10,288,139,836.09
  5. Step 5: Solve for x
    x = 10,288,139,836.09/84,957.60
  6. Step 6: Final answer
    x = 121,097.35

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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.