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Finding the Fourth Proportional to 70,790.61, 106,235.10 and 45,768.60

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Solution

The fourth proportional to 70,790.61, 106,235.10 and 45,768.60 is: 68,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,790.61 : 106,235.10 = 45,768.60 : x
  2. Step 2: Convert to fraction form
    70,790.61/106,235.10 = 45,768.60/x
  3. Step 3: Cross multiply
    70,790.61x = 106,235.10 × 45,768.60
  4. Step 4: Simplify right side
    70,790.61x = 4,862,231,797.86
  5. Step 5: Solve for x
    x = 4,862,231,797.86/70,790.61
  6. Step 6: Final answer
    x = 68,684.70

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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.