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Finding the Fourth Proportional to 217,362.60, 325,934.55 and 128,643.30

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Solution

The fourth proportional to 217,362.60, 325,934.55 and 128,643.30 is: 192,900.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,362.60 : 325,934.55 = 128,643.30 : x
  2. Step 2: Convert to fraction form
    217,362.60/325,934.55 = 128,643.30/x
  3. Step 3: Cross multiply
    217,362.60x = 325,934.55 × 128,643.30
  4. Step 4: Simplify right side
    217,362.60x = 41,929,296,096.02
  5. Step 5: Solve for x
    x = 41,929,296,096.02/217,362.60
  6. Step 6: Final answer
    x = 192,900.23

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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.