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Finding the Fourth Proportional to 71,073.30, 106,609.95 and 21,154.12

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Solution

The fourth proportional to 71,073.30, 106,609.95 and 21,154.12 is: 31,731.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,073.30 : 106,609.95 = 21,154.12 : x
  2. Step 2: Convert to fraction form
    71,073.30/106,609.95 = 21,154.12/x
  3. Step 3: Cross multiply
    71,073.30x = 106,609.95 × 21,154.12
  4. Step 4: Simplify right side
    71,073.30x = 2,255,239,675.49
  5. Step 5: Solve for x
    x = 2,255,239,675.49/71,073.30
  6. Step 6: Final answer
    x = 31,731.18

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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.