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Finding the Fourth Proportional to 86,647.34, 129,944.54 and 36,726.50

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Solution

The fourth proportional to 86,647.34, 129,944.54 and 36,726.50 is: 55,078.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,647.34 : 129,944.54 = 36,726.50 : x
  2. Step 2: Convert to fraction form
    86,647.34/129,944.54 = 36,726.50/x
  3. Step 3: Cross multiply
    86,647.34x = 129,944.54 × 36,726.50
  4. Step 4: Simplify right side
    86,647.34x = 4,772,408,148.31
  5. Step 5: Solve for x
    x = 4,772,408,148.31/86,647.34
  6. Step 6: Final answer
    x = 55,078.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.