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Finding the Fourth Proportional to 245,958.84, 368,977.08 and 86,079.42

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Solution

The fourth proportional to 245,958.84, 368,977.08 and 86,079.42 is: 129,132.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,958.84 : 368,977.08 = 86,079.42 : x
  2. Step 2: Convert to fraction form
    245,958.84/368,977.08 = 86,079.42/x
  3. Step 3: Cross multiply
    245,958.84x = 368,977.08 × 86,079.42
  4. Step 4: Simplify right side
    245,958.84x = 31,761,333,039.69
  5. Step 5: Solve for x
    x = 31,761,333,039.69/245,958.84
  6. Step 6: Final answer
    x = 129,132.72

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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.