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Finding the Fourth Proportional to 158,596.78, 218,866.54 and 86,972.52

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Solution

The fourth proportional to 158,596.78, 218,866.54 and 86,972.52 is: 120,023.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,596.78 : 218,866.54 = 86,972.52 : x
  2. Step 2: Convert to fraction form
    158,596.78/218,866.54 = 86,972.52/x
  3. Step 3: Cross multiply
    158,596.78x = 218,866.54 × 86,972.52
  4. Step 4: Simplify right side
    158,596.78x = 19,035,374,527.48
  5. Step 5: Solve for x
    x = 19,035,374,527.48/158,596.78
  6. Step 6: Final answer
    x = 120,023.71

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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.