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Finding the Fourth Proportional to 158,382.64, 218,507.16 and 90,403.39

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Solution

The fourth proportional to 158,382.64, 218,507.16 and 90,403.39 is: 124,721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,382.64 : 218,507.16 = 90,403.39 : x
  2. Step 2: Convert to fraction form
    158,382.64/218,507.16 = 90,403.39/x
  3. Step 3: Cross multiply
    158,382.64x = 218,507.16 × 90,403.39
  4. Step 4: Simplify right side
    158,382.64x = 19,753,788,003.27
  5. Step 5: Solve for x
    x = 19,753,788,003.27/158,382.64
  6. Step 6: Final answer
    x = 124,721.93

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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.