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Finding the Fourth Proportional to 154,051.52, 212,587.17 and 86,069

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Solution

The fourth proportional to 154,051.52, 212,587.17 and 86,069 is: 118,773.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,051.52 : 212,587.17 = 86,069 : x
  2. Step 2: Convert to fraction form
    154,051.52/212,587.17 = 86,069/x
  3. Step 3: Cross multiply
    154,051.52x = 212,587.17 × 86,069
  4. Step 4: Simplify right side
    154,051.52x = 18,297,165,134.73
  5. Step 5: Solve for x
    x = 18,297,165,134.73/154,051.52
  6. Step 6: Final answer
    x = 118,773.03

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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.