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Finding the Fourth Proportional to 159,390.54, 219,958.93 and 87,770.39

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Solution

The fourth proportional to 159,390.54, 219,958.93 and 87,770.39 is: 121,123.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,390.54 : 219,958.93 = 87,770.39 : x
  2. Step 2: Convert to fraction form
    159,390.54/219,958.93 = 87,770.39/x
  3. Step 3: Cross multiply
    159,390.54x = 219,958.93 × 87,770.39
  4. Step 4: Simplify right side
    159,390.54x = 19,305,881,070.08
  5. Step 5: Solve for x
    x = 19,305,881,070.08/159,390.54
  6. Step 6: Final answer
    x = 121,123.13

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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.