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Finding the Fourth Proportional to 70,613.88, 105,935.40 and 20,695.61

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Solution

The fourth proportional to 70,613.88, 105,935.40 and 20,695.61 is: 31,047.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,613.88 : 105,935.40 = 20,695.61 : x
  2. Step 2: Convert to fraction form
    70,613.88/105,935.40 = 20,695.61/x
  3. Step 3: Cross multiply
    70,613.88x = 105,935.40 × 20,695.61
  4. Step 4: Simplify right side
    70,613.88x = 2,192,397,193.92
  5. Step 5: Solve for x
    x = 2,192,397,193.92/70,613.88
  6. Step 6: Final answer
    x = 31,047.68

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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.