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Finding the Fourth Proportional to 158,386.96, 218,574.04 and 86,769.56

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Solution

The fourth proportional to 158,386.96, 218,574.04 and 86,769.56 is: 119,742.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,386.96 : 218,574.04 = 86,769.56 : x
  2. Step 2: Convert to fraction form
    158,386.96/218,574.04 = 86,769.56/x
  3. Step 3: Cross multiply
    158,386.96x = 218,574.04 × 86,769.56
  4. Step 4: Simplify right side
    158,386.96x = 18,965,573,278.22
  5. Step 5: Solve for x
    x = 18,965,573,278.22/158,386.96
  6. Step 6: Final answer
    x = 119,742.01

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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.