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Finding the Fourth Proportional to 71,257.60, 106,886.40 and 18,672.40

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Solution

The fourth proportional to 71,257.60, 106,886.40 and 18,672.40 is: 28,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,257.60 : 106,886.40 = 18,672.40 : x
  2. Step 2: Convert to fraction form
    71,257.60/106,886.40 = 18,672.40/x
  3. Step 3: Cross multiply
    71,257.60x = 106,886.40 × 18,672.40
  4. Step 4: Simplify right side
    71,257.60x = 1,995,825,615.36
  5. Step 5: Solve for x
    x = 1,995,825,615.36/71,257.60
  6. Step 6: Final answer
    x = 28,008.60

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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.