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Finding the Fourth Proportional to 120,389.91, 180,761.70 and 118,263.73

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Solution

The fourth proportional to 120,389.91, 180,761.70 and 118,263.73 is: 177,569.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,389.91 : 180,761.70 = 118,263.73 : x
  2. Step 2: Convert to fraction form
    120,389.91/180,761.70 = 118,263.73/x
  3. Step 3: Cross multiply
    120,389.91x = 180,761.70 × 118,263.73
  4. Step 4: Simplify right side
    120,389.91x = 21,377,553,643.63
  5. Step 5: Solve for x
    x = 21,377,553,643.63/120,389.91
  6. Step 6: Final answer
    x = 177,569.32

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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.