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Finding the Fourth Proportional to 235,428.90, 353,143.35 and 168,728.10

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Solution

The fourth proportional to 235,428.90, 353,143.35 and 168,728.10 is: 253,092.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,428.90 : 353,143.35 = 168,728.10 : x
  2. Step 2: Convert to fraction form
    235,428.90/353,143.35 = 168,728.10/x
  3. Step 3: Cross multiply
    235,428.90x = 353,143.35 × 168,728.10
  4. Step 4: Simplify right side
    235,428.90x = 59,585,206,473.14
  5. Step 5: Solve for x
    x = 59,585,206,473.14/235,428.90
  6. Step 6: Final answer
    x = 253,092.15

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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.