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Finding the Fourth Proportional to 158,463.64, 218,625.51 and 90,431.50

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Solution

The fourth proportional to 158,463.64, 218,625.51 and 90,431.50 is: 124,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,463.64 : 218,625.51 = 90,431.50 : x
  2. Step 2: Convert to fraction form
    158,463.64/218,625.51 = 90,431.50/x
  3. Step 3: Cross multiply
    158,463.64x = 218,625.51 × 90,431.50
  4. Step 4: Simplify right side
    158,463.64x = 19,770,632,807.57
  5. Step 5: Solve for x
    x = 19,770,632,807.57/158,463.64
  6. Step 6: Final answer
    x = 124,764.47

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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.