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Finding the Fourth Proportional to 158,463.36, 218,685.42 and 90,491.40

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Solution

The fourth proportional to 158,463.36, 218,685.42 and 90,491.40 is: 124,881.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,463.36 : 218,685.42 = 90,491.40 : x
  2. Step 2: Convert to fraction form
    158,463.36/218,685.42 = 90,491.40/x
  3. Step 3: Cross multiply
    158,463.36x = 218,685.42 × 90,491.40
  4. Step 4: Simplify right side
    158,463.36x = 19,789,149,815.39
  5. Step 5: Solve for x
    x = 19,789,149,815.39/158,463.36
  6. Step 6: Final answer
    x = 124,881.55

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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.