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Finding the Fourth Proportional to 250,722.96, 375,730.82 and 138,453.72

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Solution

The fourth proportional to 250,722.96, 375,730.82 and 138,453.72 is: 207,485.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,722.96 : 375,730.82 = 138,453.72 : x
  2. Step 2: Convert to fraction form
    250,722.96/375,730.82 = 138,453.72/x
  3. Step 3: Cross multiply
    250,722.96x = 375,730.82 × 138,453.72
  4. Step 4: Simplify right side
    250,722.96x = 52,021,329,055.38
  5. Step 5: Solve for x
    x = 52,021,329,055.38/250,722.96
  6. Step 6: Final answer
    x = 207,485.30

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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.