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Finding the Fourth Proportional to 253,871.55, 350,328.49 and 139,128.32

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Solution

The fourth proportional to 253,871.55, 350,328.49 and 139,128.32 is: 191,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,871.55 : 350,328.49 = 139,128.32 : x
  2. Step 2: Convert to fraction form
    253,871.55/350,328.49 = 139,128.32/x
  3. Step 3: Cross multiply
    253,871.55x = 350,328.49 × 139,128.32
  4. Step 4: Simplify right side
    253,871.55x = 48,740,612,162.37
  5. Step 5: Solve for x
    x = 48,740,612,162.37/253,871.55
  6. Step 6: Final answer
    x = 191,989.26

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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.