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Finding the Fourth Proportional to 158,415.62, 218,605.20 and 90,429.89

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Solution

The fourth proportional to 158,415.62, 218,605.20 and 90,429.89 is: 124,788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,415.62 : 218,605.20 = 90,429.89 : x
  2. Step 2: Convert to fraction form
    158,415.62/218,605.20 = 90,429.89/x
  3. Step 3: Cross multiply
    158,415.62x = 218,605.20 × 90,429.89
  4. Step 4: Simplify right side
    158,415.62x = 19,768,444,189.43
  5. Step 5: Solve for x
    x = 19,768,444,189.43/158,415.62
  6. Step 6: Final answer
    x = 124,788.48

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1.5x scale

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.