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Finding the Fourth Proportional to 119,855.70, 165,361.50 and 77,439.24

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Solution

The fourth proportional to 119,855.70, 165,361.50 and 77,439.24 is: 106,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,855.70 : 165,361.50 = 77,439.24 : x
  2. Step 2: Convert to fraction form
    119,855.70/165,361.50 = 77,439.24/x
  3. Step 3: Cross multiply
    119,855.70x = 165,361.50 × 77,439.24
  4. Step 4: Simplify right side
    119,855.70x = 12,805,468,885.26
  5. Step 5: Solve for x
    x = 12,805,468,885.26/119,855.70
  6. Step 6: Final answer
    x = 106,840.72

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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.