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Finding the Fourth Proportional to 86,739.16, 129,375.84 and 84,114.04

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Solution

The fourth proportional to 86,739.16, 129,375.84 and 84,114.04 is: 125,460.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,739.16 : 129,375.84 = 84,114.04 : x
  2. Step 2: Convert to fraction form
    86,739.16/129,375.84 = 84,114.04/x
  3. Step 3: Cross multiply
    86,739.16x = 129,375.84 × 84,114.04
  4. Step 4: Simplify right side
    86,739.16x = 10,882,324,580.79
  5. Step 5: Solve for x
    x = 10,882,324,580.79/86,739.16
  6. Step 6: Final answer
    x = 125,460.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.