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Finding the Fourth Proportional to 255,311.15, 352,322.53 and 142,133.90

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Solution

The fourth proportional to 255,311.15, 352,322.53 and 142,133.90 is: 196,140.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,311.15 : 352,322.53 = 142,133.90 : x
  2. Step 2: Convert to fraction form
    255,311.15/352,322.53 = 142,133.90/x
  3. Step 3: Cross multiply
    255,311.15x = 352,322.53 × 142,133.90
  4. Step 4: Simplify right side
    255,311.15x = 50,076,973,129.82
  5. Step 5: Solve for x
    x = 50,076,973,129.82/255,311.15
  6. Step 6: Final answer
    x = 196,140.96

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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.