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Finding the Fourth Proportional to 159,135.58, 219,602.72 and 87,515.60

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Solution

The fourth proportional to 159,135.58, 219,602.72 and 87,515.60 is: 120,769.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,135.58 : 219,602.72 = 87,515.60 : x
  2. Step 2: Convert to fraction form
    159,135.58/219,602.72 = 87,515.60/x
  3. Step 3: Cross multiply
    159,135.58x = 219,602.72 × 87,515.60
  4. Step 4: Simplify right side
    159,135.58x = 19,218,662,704.42
  5. Step 5: Solve for x
    x = 19,218,662,704.42/159,135.58
  6. Step 6: Final answer
    x = 120,769.11

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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.