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Finding the Fourth Proportional to 85,615.86, 118,158.78 and 49,318.56

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Solution

The fourth proportional to 85,615.86, 118,158.78 and 49,318.56 is: 68,064.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.86 : 118,158.78 = 49,318.56 : x
  2. Step 2: Convert to fraction form
    85,615.86/118,158.78 = 49,318.56/x
  3. Step 3: Cross multiply
    85,615.86x = 118,158.78 × 49,318.56
  4. Step 4: Simplify right side
    85,615.86x = 5,827,420,880.96
  5. Step 5: Solve for x
    x = 5,827,420,880.96/85,615.86
  6. Step 6: Final answer
    x = 68,064.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.