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Finding the Fourth Proportional to 70,366.64, 105,525.60 and 20,433.20

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Solution

The fourth proportional to 70,366.64, 105,525.60 and 20,433.20 is: 30,642.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,366.64 : 105,525.60 = 20,433.20 : x
  2. Step 2: Convert to fraction form
    70,366.64/105,525.60 = 20,433.20/x
  3. Step 3: Cross multiply
    70,366.64x = 105,525.60 × 20,433.20
  4. Step 4: Simplify right side
    70,366.64x = 2,156,225,689.92
  5. Step 5: Solve for x
    x = 2,156,225,689.92/70,366.64
  6. Step 6: Final answer
    x = 30,642.73

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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.