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Finding the Fourth Proportional to 70,366.20, 105,554.84 and 20,447.16

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Solution

The fourth proportional to 70,366.20, 105,554.84 and 20,447.16 is: 30,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,366.20 : 105,554.84 = 20,447.16 : x
  2. Step 2: Convert to fraction form
    70,366.20/105,554.84 = 20,447.16/x
  3. Step 3: Cross multiply
    70,366.20x = 105,554.84 × 20,447.16
  4. Step 4: Simplify right side
    70,366.20x = 2,158,296,600.02
  5. Step 5: Solve for x
    x = 2,158,296,600.02/70,366.20
  6. Step 6: Final answer
    x = 30,672.35

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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.