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Finding the Fourth Proportional to 132,155.80, 197,828.70 and 72,809.80

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Solution

The fourth proportional to 132,155.80, 197,828.70 and 72,809.80 is: 108,991.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,155.80 : 197,828.70 = 72,809.80 : x
  2. Step 2: Convert to fraction form
    132,155.80/197,828.70 = 72,809.80/x
  3. Step 3: Cross multiply
    132,155.80x = 197,828.70 × 72,809.80
  4. Step 4: Simplify right side
    132,155.80x = 14,403,868,081.26
  5. Step 5: Solve for x
    x = 14,403,868,081.26/132,155.80
  6. Step 6: Final answer
    x = 108,991.57

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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.