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Finding the Fourth Proportional to 86,343.95, 129,529.76 and 36,431.39

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Solution

The fourth proportional to 86,343.95, 129,529.76 and 36,431.39 is: 54,652.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,343.95 : 129,529.76 = 36,431.39 : x
  2. Step 2: Convert to fraction form
    86,343.95/129,529.76 = 36,431.39/x
  3. Step 3: Cross multiply
    86,343.95x = 129,529.76 × 36,431.39
  4. Step 4: Simplify right side
    86,343.95x = 4,718,949,344.83
  5. Step 5: Solve for x
    x = 4,718,949,344.83/86,343.95
  6. Step 6: Final answer
    x = 54,652.92

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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.