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Finding the Fourth Proportional to 254,603.80, 381,946.92 and 86,134.33

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Solution

The fourth proportional to 254,603.80, 381,946.92 and 86,134.33 is: 129,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,603.80 : 381,946.92 = 86,134.33 : x
  2. Step 2: Convert to fraction form
    254,603.80/381,946.92 = 86,134.33/x
  3. Step 3: Cross multiply
    254,603.80x = 381,946.92 × 86,134.33
  4. Step 4: Simplify right side
    254,603.80x = 32,898,742,049.76
  5. Step 5: Solve for x
    x = 32,898,742,049.76/254,603.80
  6. Step 6: Final answer
    x = 129,215.44

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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.