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Finding the Fourth Proportional to 158,604.06, 218,873.16 and 90,642.12

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Solution

The fourth proportional to 158,604.06, 218,873.16 and 90,642.12 is: 125,085.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,604.06 : 218,873.16 = 90,642.12 : x
  2. Step 2: Convert to fraction form
    158,604.06/218,873.16 = 90,642.12/x
  3. Step 3: Cross multiply
    158,604.06x = 218,873.16 × 90,642.12
  4. Step 4: Simplify right side
    158,604.06x = 19,839,127,643.89
  5. Step 5: Solve for x
    x = 19,839,127,643.89/158,604.06
  6. Step 6: Final answer
    x = 125,085.88

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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.