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Finding the Fourth Proportional to 71,636.60, 107,455.80 and 21,717.20

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Solution

The fourth proportional to 71,636.60, 107,455.80 and 21,717.20 is: 32,576.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,636.60 : 107,455.80 = 21,717.20 : x
  2. Step 2: Convert to fraction form
    71,636.60/107,455.80 = 21,717.20/x
  3. Step 3: Cross multiply
    71,636.60x = 107,455.80 × 21,717.20
  4. Step 4: Simplify right side
    71,636.60x = 2,333,639,099.76
  5. Step 5: Solve for x
    x = 2,333,639,099.76/71,636.60
  6. Step 6: Final answer
    x = 32,576.07

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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.