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Finding the Fourth Proportional to 154,274.76, 212,918.87 and 86,295.51

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Solution

The fourth proportional to 154,274.76, 212,918.87 and 86,295.51 is: 119,098.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,274.76 : 212,918.87 = 86,295.51 : x
  2. Step 2: Convert to fraction form
    154,274.76/212,918.87 = 86,295.51/x
  3. Step 3: Cross multiply
    154,274.76x = 212,918.87 × 86,295.51
  4. Step 4: Simplify right side
    154,274.76x = 18,373,942,691.01
  5. Step 5: Solve for x
    x = 18,373,942,691.01/154,274.76
  6. Step 6: Final answer
    x = 119,098.83

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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.