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Finding the Fourth Proportional to 86,703.48, 129,873.78 and 76,186.44

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Solution

The fourth proportional to 86,703.48, 129,873.78 and 76,186.44 is: 114,120.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,703.48 : 129,873.78 = 76,186.44 : x
  2. Step 2: Convert to fraction form
    86,703.48/129,873.78 = 76,186.44/x
  3. Step 3: Cross multiply
    86,703.48x = 129,873.78 × 76,186.44
  4. Step 4: Simplify right side
    86,703.48x = 9,894,620,947.54
  5. Step 5: Solve for x
    x = 9,894,620,947.54/86,703.48
  6. Step 6: Final answer
    x = 114,120.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.