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Finding the Fourth Proportional to 70,326.70, 105,500.31 and 20,407.08

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Solution

The fourth proportional to 70,326.70, 105,500.31 and 20,407.08 is: 30,613.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,326.70 : 105,500.31 = 20,407.08 : x
  2. Step 2: Convert to fraction form
    70,326.70/105,500.31 = 20,407.08/x
  3. Step 3: Cross multiply
    70,326.70x = 105,500.31 × 20,407.08
  4. Step 4: Simplify right side
    70,326.70x = 2,152,952,738.69
  5. Step 5: Solve for x
    x = 2,152,952,738.69/70,326.70
  6. Step 6: Final answer
    x = 30,613.59

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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.