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Finding the Fourth Proportional to 235,199.70, 352,697.49 and 85,390.20

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Solution

The fourth proportional to 235,199.70, 352,697.49 and 85,390.20 is: 128,048.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,199.70 : 352,697.49 = 85,390.20 : x
  2. Step 2: Convert to fraction form
    235,199.70/352,697.49 = 85,390.20/x
  3. Step 3: Cross multiply
    235,199.70x = 352,697.49 × 85,390.20
  4. Step 4: Simplify right side
    235,199.70x = 30,116,909,210.60
  5. Step 5: Solve for x
    x = 30,116,909,210.60/235,199.70
  6. Step 6: Final answer
    x = 128,048.25

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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.