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Finding the Fourth Proportional to 85,679.80, 118,231.02 and 51,223.74

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Solution

The fourth proportional to 85,679.80, 118,231.02 and 51,223.74 is: 70,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,679.80 : 118,231.02 = 51,223.74 : x
  2. Step 2: Convert to fraction form
    85,679.80/118,231.02 = 51,223.74/x
  3. Step 3: Cross multiply
    85,679.80x = 118,231.02 × 51,223.74
  4. Step 4: Simplify right side
    85,679.80x = 6,056,235,028.41
  5. Step 5: Solve for x
    x = 6,056,235,028.41/85,679.80
  6. Step 6: Final answer
    x = 70,684.51

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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.