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Finding the Fourth Proportional to 158,219.76, 218,288.99 and 90,187.66

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Solution

The fourth proportional to 158,219.76, 218,288.99 and 90,187.66 is: 124,428.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,219.76 : 218,288.99 = 90,187.66 : x
  2. Step 2: Convert to fraction form
    158,219.76/218,288.99 = 90,187.66/x
  3. Step 3: Cross multiply
    158,219.76x = 218,288.99 × 90,187.66
  4. Step 4: Simplify right side
    158,219.76x = 19,686,973,710.19
  5. Step 5: Solve for x
    x = 19,686,973,710.19/158,219.76
  6. Step 6: Final answer
    x = 124,428.03

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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.