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Finding the Fourth Proportional to 253,129.32, 349,325.46 and 139,956.12

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Solution

The fourth proportional to 253,129.32, 349,325.46 and 139,956.12 is: 193,143.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,129.32 : 349,325.46 = 139,956.12 : x
  2. Step 2: Convert to fraction form
    253,129.32/349,325.46 = 139,956.12/x
  3. Step 3: Cross multiply
    253,129.32x = 349,325.46 × 139,956.12
  4. Step 4: Simplify right side
    253,129.32x = 48,890,235,998.82
  5. Step 5: Solve for x
    x = 48,890,235,998.82/253,129.32
  6. Step 6: Final answer
    x = 193,143.32

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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.