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Finding the Fourth Proportional to 115,392.12, 159,216.42 and 86,742.42

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Solution

The fourth proportional to 115,392.12, 159,216.42 and 86,742.42 is: 119,685.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,392.12 : 159,216.42 = 86,742.42 : x
  2. Step 2: Convert to fraction form
    115,392.12/159,216.42 = 86,742.42/x
  3. Step 3: Cross multiply
    115,392.12x = 159,216.42 × 86,742.42
  4. Step 4: Simplify right side
    115,392.12x = 13,810,817,574.54
  5. Step 5: Solve for x
    x = 13,810,817,574.54/115,392.12
  6. Step 6: Final answer
    x = 119,685.97

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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.