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Finding the Fourth Proportional to 315,645.30, 473,156.28 and 125,991.42

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Solution

The fourth proportional to 315,645.30, 473,156.28 and 125,991.42 is: 188,862.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,645.30 : 473,156.28 = 125,991.42 : x
  2. Step 2: Convert to fraction form
    315,645.30/473,156.28 = 125,991.42/x
  3. Step 3: Cross multiply
    315,645.30x = 473,156.28 × 125,991.42
  4. Step 4: Simplify right side
    315,645.30x = 59,613,631,599.12
  5. Step 5: Solve for x
    x = 59,613,631,599.12/315,645.30
  6. Step 6: Final answer
    x = 188,862.73

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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.