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Finding the Fourth Proportional to 79,431.84, 119,609.28 and 57,395.52

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Solution

The fourth proportional to 79,431.84, 119,609.28 and 57,395.52 is: 86,426.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,431.84 : 119,609.28 = 57,395.52 : x
  2. Step 2: Convert to fraction form
    79,431.84/119,609.28 = 57,395.52/x
  3. Step 3: Cross multiply
    79,431.84x = 119,609.28 × 57,395.52
  4. Step 4: Simplify right side
    79,431.84x = 6,865,036,822.43
  5. Step 5: Solve for x
    x = 6,865,036,822.43/79,431.84
  6. Step 6: Final answer
    x = 86,426.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.