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Finding the Fourth Proportional to 235,403.40, 353,105.10 and 85,812.60

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Solution

The fourth proportional to 235,403.40, 353,105.10 and 85,812.60 is: 128,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,403.40 : 353,105.10 = 85,812.60 : x
  2. Step 2: Convert to fraction form
    235,403.40/353,105.10 = 85,812.60/x
  3. Step 3: Cross multiply
    235,403.40x = 353,105.10 × 85,812.60
  4. Step 4: Simplify right side
    235,403.40x = 30,300,866,704.26
  5. Step 5: Solve for x
    x = 30,300,866,704.26/235,403.40
  6. Step 6: Final answer
    x = 128,718.90

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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.