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Finding the Fourth Proportional to 85,712.76, 118,336.18 and 67,879.80

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Solution

The fourth proportional to 85,712.76, 118,336.18 and 67,879.80 is: 93,715.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,712.76 : 118,336.18 = 67,879.80 : x
  2. Step 2: Convert to fraction form
    85,712.76/118,336.18 = 67,879.80/x
  3. Step 3: Cross multiply
    85,712.76x = 118,336.18 × 67,879.80
  4. Step 4: Simplify right side
    85,712.76x = 8,032,636,231.16
  5. Step 5: Solve for x
    x = 8,032,636,231.16/85,712.76
  6. Step 6: Final answer
    x = 93,715.76

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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.