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Finding the Fourth Proportional to 119,709.40, 179,952.90 and 84,890.20

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Solution

The fourth proportional to 119,709.40, 179,952.90 and 84,890.20 is: 127,611.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,709.40 : 179,952.90 = 84,890.20 : x
  2. Step 2: Convert to fraction form
    119,709.40/179,952.90 = 84,890.20/x
  3. Step 3: Cross multiply
    119,709.40x = 179,952.90 × 84,890.20
  4. Step 4: Simplify right side
    119,709.40x = 15,276,237,671.58
  5. Step 5: Solve for x
    x = 15,276,237,671.58/119,709.40
  6. Step 6: Final answer
    x = 127,611.01

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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.