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Finding the Fourth Proportional to 235,418.40, 353,127.60 and 85,827.60

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Solution

The fourth proportional to 235,418.40, 353,127.60 and 85,827.60 is: 128,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,418.40 : 353,127.60 = 85,827.60 : x
  2. Step 2: Convert to fraction form
    235,418.40/353,127.60 = 85,827.60/x
  3. Step 3: Cross multiply
    235,418.40x = 353,127.60 × 85,827.60
  4. Step 4: Simplify right side
    235,418.40x = 30,308,094,401.76
  5. Step 5: Solve for x
    x = 30,308,094,401.76/235,418.40
  6. Step 6: Final answer
    x = 128,741.40

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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.