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Finding the Fourth Proportional to 159,135.80, 219,603.02 and 87,515.81

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Solution

The fourth proportional to 159,135.80, 219,603.02 and 87,515.81 is: 120,769.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,135.80 : 219,603.02 = 87,515.81 : x
  2. Step 2: Convert to fraction form
    159,135.80/219,603.02 = 87,515.81/x
  3. Step 3: Cross multiply
    159,135.80x = 219,603.02 × 87,515.81
  4. Step 4: Simplify right side
    159,135.80x = 19,218,736,613.36
  5. Step 5: Solve for x
    x = 19,218,736,613.36/159,135.80
  6. Step 6: Final answer
    x = 120,769.41

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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.