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Finding the Fourth Proportional to 71,355.88, 107,029.70 and 21,434.88

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Solution

The fourth proportional to 71,355.88, 107,029.70 and 21,434.88 is: 32,151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,355.88 : 107,029.70 = 21,434.88 : x
  2. Step 2: Convert to fraction form
    71,355.88/107,029.70 = 21,434.88/x
  3. Step 3: Cross multiply
    71,355.88x = 107,029.70 × 21,434.88
  4. Step 4: Simplify right side
    71,355.88x = 2,294,168,775.94
  5. Step 5: Solve for x
    x = 2,294,168,775.94/71,355.88
  6. Step 6: Final answer
    x = 32,151.08

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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.