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Finding the Fourth Proportional to 81,353.70, 109,477.58 and 81,353.70

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Solution

The fourth proportional to 81,353.70, 109,477.58 and 81,353.70 is: 109,477.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,353.70 : 109,477.58 = 81,353.70 : x
  2. Step 2: Convert to fraction form
    81,353.70/109,477.58 = 81,353.70/x
  3. Step 3: Cross multiply
    81,353.70x = 109,477.58 × 81,353.70
  4. Step 4: Simplify right side
    81,353.70x = 8,906,405,793.28
  5. Step 5: Solve for x
    x = 8,906,405,793.28/81,353.70
  6. Step 6: Final answer
    x = 109,477.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.