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Finding the Fourth Proportional to 158,695.85, 218,992.95 and 87,074.09

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Solution

The fourth proportional to 158,695.85, 218,992.95 and 87,074.09 is: 120,158.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,695.85 : 218,992.95 = 87,074.09 : x
  2. Step 2: Convert to fraction form
    158,695.85/218,992.95 = 87,074.09/x
  3. Step 3: Cross multiply
    158,695.85x = 218,992.95 × 87,074.09
  4. Step 4: Simplify right side
    158,695.85x = 19,068,611,402.30
  5. Step 5: Solve for x
    x = 19,068,611,402.30/158,695.85
  6. Step 6: Final answer
    x = 120,158.22

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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.