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Finding the Fourth Proportional to 85,092.48, 128,275.80 and 79,383.60

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Solution

The fourth proportional to 85,092.48, 128,275.80 and 79,383.60 is: 119,669.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,092.48 : 128,275.80 = 79,383.60 : x
  2. Step 2: Convert to fraction form
    85,092.48/128,275.80 = 79,383.60/x
  3. Step 3: Cross multiply
    85,092.48x = 128,275.80 × 79,383.60
  4. Step 4: Simplify right side
    85,092.48x = 10,182,994,796.88
  5. Step 5: Solve for x
    x = 10,182,994,796.88/85,092.48
  6. Step 6: Final answer
    x = 119,669.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.