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Finding the Fourth Proportional to 70,650.82, 105,549.15 and 45,485.74

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Solution

The fourth proportional to 70,650.82, 105,549.15 and 45,485.74 is: 67,953.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,650.82 : 105,549.15 = 45,485.74 : x
  2. Step 2: Convert to fraction form
    70,650.82/105,549.15 = 45,485.74/x
  3. Step 3: Cross multiply
    70,650.82x = 105,549.15 × 45,485.74
  4. Step 4: Simplify right side
    70,650.82x = 4,800,981,194.12
  5. Step 5: Solve for x
    x = 4,800,981,194.12/70,650.82
  6. Step 6: Final answer
    x = 67,953.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.