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Finding the Fourth Proportional to 210,792.87, 316,189.85 and 86,133.87

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Solution

The fourth proportional to 210,792.87, 316,189.85 and 86,133.87 is: 129,201.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,792.87 : 316,189.85 = 86,133.87 : x
  2. Step 2: Convert to fraction form
    210,792.87/316,189.85 = 86,133.87/x
  3. Step 3: Cross multiply
    210,792.87x = 316,189.85 × 86,133.87
  4. Step 4: Simplify right side
    210,792.87x = 27,234,655,004.55
  5. Step 5: Solve for x
    x = 27,234,655,004.55/210,792.87
  6. Step 6: Final answer
    x = 129,201.03

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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.