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Finding the Fourth Proportional to 235,129.81, 352,692.83 and 139,728.19

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Solution

The fourth proportional to 235,129.81, 352,692.83 and 139,728.19 is: 209,591.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,129.81 : 352,692.83 = 139,728.19 : x
  2. Step 2: Convert to fraction form
    235,129.81/352,692.83 = 139,728.19/x
  3. Step 3: Cross multiply
    235,129.81x = 352,692.83 × 139,728.19
  4. Step 4: Simplify right side
    235,129.81x = 49,281,130,761.88
  5. Step 5: Solve for x
    x = 49,281,130,761.88/235,129.81
  6. Step 6: Final answer
    x = 209,591.16

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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.