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Finding the Fourth Proportional to 81,835.20, 122,752.80 and 29,246.40

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Solution

The fourth proportional to 81,835.20, 122,752.80 and 29,246.40 is: 43,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,835.20 : 122,752.80 = 29,246.40 : x
  2. Step 2: Convert to fraction form
    81,835.20/122,752.80 = 29,246.40/x
  3. Step 3: Cross multiply
    81,835.20x = 122,752.80 × 29,246.40
  4. Step 4: Simplify right side
    81,835.20x = 3,590,077,489.92
  5. Step 5: Solve for x
    x = 3,590,077,489.92/81,835.20
  6. Step 6: Final answer
    x = 43,869.60

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1.5x scale

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.