Home / 158,390.37-218,573.10-86,769.72

Finding the Fourth Proportional to 158,390.37, 218,573.10 and 86,769.72

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Solution

The fourth proportional to 158,390.37, 218,573.10 and 86,769.72 is: 119,739.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,390.37 : 218,573.10 = 86,769.72 : x
  2. Step 2: Convert to fraction form
    158,390.37/218,573.10 = 86,769.72/x
  3. Step 3: Cross multiply
    158,390.37x = 218,573.10 × 86,769.72
  4. Step 4: Simplify right side
    158,390.37x = 18,965,526,686.53
  5. Step 5: Solve for x
    x = 18,965,526,686.53/158,390.37
  6. Step 6: Final answer
    x = 119,739.14

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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.