Home / 84,905.20-127,276.80-31,582.90

Finding the Fourth Proportional to 84,905.20, 127,276.80 and 31,582.90

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Solution

The fourth proportional to 84,905.20, 127,276.80 and 31,582.90 is: 47,344.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,905.20 : 127,276.80 = 31,582.90 : x
  2. Step 2: Convert to fraction form
    84,905.20/127,276.80 = 31,582.90/x
  3. Step 3: Cross multiply
    84,905.20x = 127,276.80 × 31,582.90
  4. Step 4: Simplify right side
    84,905.20x = 4,019,770,446.72
  5. Step 5: Solve for x
    x = 4,019,770,446.72/84,905.20
  6. Step 6: Final answer
    x = 47,344.22

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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.