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Finding the Fourth Proportional to 158,379.59, 218,520.28 and 90,372.09

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Solution

The fourth proportional to 158,379.59, 218,520.28 and 90,372.09 is: 124,688.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,379.59 : 218,520.28 = 90,372.09 : x
  2. Step 2: Convert to fraction form
    158,379.59/218,520.28 = 90,372.09/x
  3. Step 3: Cross multiply
    158,379.59x = 218,520.28 × 90,372.09
  4. Step 4: Simplify right side
    158,379.59x = 19,748,134,410.99
  5. Step 5: Solve for x
    x = 19,748,134,410.99/158,379.59
  6. Step 6: Final answer
    x = 124,688.63

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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.