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Finding the Fourth Proportional to 253,935.60, 380,929.32 and 87,702

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Solution

The fourth proportional to 253,935.60, 380,929.32 and 87,702 is: 131,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,935.60 : 380,929.32 = 87,702 : x
  2. Step 2: Convert to fraction form
    253,935.60/380,929.32 = 87,702/x
  3. Step 3: Cross multiply
    253,935.60x = 380,929.32 × 87,702
  4. Step 4: Simplify right side
    253,935.60x = 33,408,263,222.64
  5. Step 5: Solve for x
    x = 33,408,263,222.64/253,935.60
  6. Step 6: Final answer
    x = 131,561.95

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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.