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Finding the Fourth Proportional to 158,595.74, 218,868.44 and 86,978.37

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Solution

The fourth proportional to 158,595.74, 218,868.44 and 86,978.37 is: 120,033.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,595.74 : 218,868.44 = 86,978.37 : x
  2. Step 2: Convert to fraction form
    158,595.74/218,868.44 = 86,978.37/x
  3. Step 3: Cross multiply
    158,595.74x = 218,868.44 × 86,978.37
  4. Step 4: Simplify right side
    158,595.74x = 19,036,820,155.64
  5. Step 5: Solve for x
    x = 19,036,820,155.64/158,595.74
  6. Step 6: Final answer
    x = 120,033.62

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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.