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Finding the Fourth Proportional to 308,106.31, 425,188.70 and 172,145.11

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Solution

The fourth proportional to 308,106.31, 425,188.70 and 172,145.11 is: 237,561.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,106.31 : 425,188.70 = 172,145.11 : x
  2. Step 2: Convert to fraction form
    308,106.31/425,188.70 = 172,145.11/x
  3. Step 3: Cross multiply
    308,106.31x = 425,188.70 × 172,145.11
  4. Step 4: Simplify right side
    308,106.31x = 73,194,155,532.26
  5. Step 5: Solve for x
    x = 73,194,155,532.26/308,106.31
  6. Step 6: Final answer
    x = 237,561.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.