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Finding the Fourth Proportional to 85,859.76, 118,539 and 68,026.80

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Solution

The fourth proportional to 85,859.76, 118,539 and 68,026.80 is: 93,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,859.76 : 118,539 = 68,026.80 : x
  2. Step 2: Convert to fraction form
    85,859.76/118,539 = 68,026.80/x
  3. Step 3: Cross multiply
    85,859.76x = 118,539 × 68,026.80
  4. Step 4: Simplify right side
    85,859.76x = 8,063,828,845.20
  5. Step 5: Solve for x
    x = 8,063,828,845.20/85,859.76
  6. Step 6: Final answer
    x = 93,918.60

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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.