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Finding the Fourth Proportional to 210,007.64, 315,010.10 and 125,791.74

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Solution

The fourth proportional to 210,007.64, 315,010.10 and 125,791.74 is: 188,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,007.64 : 315,010.10 = 125,791.74 : x
  2. Step 2: Convert to fraction form
    210,007.64/315,010.10 = 125,791.74/x
  3. Step 3: Cross multiply
    210,007.64x = 315,010.10 × 125,791.74
  4. Step 4: Simplify right side
    210,007.64x = 39,625,667,967.62
  5. Step 5: Solve for x
    x = 39,625,667,967.62/210,007.64
  6. Step 6: Final answer
    x = 188,686.80

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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.