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Finding the Fourth Proportional to 159,393.12, 219,963.94 and 87,775.70

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Solution

The fourth proportional to 159,393.12, 219,963.94 and 87,775.70 is: 121,131.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,393.12 : 219,963.94 = 87,775.70 : x
  2. Step 2: Convert to fraction form
    159,393.12/219,963.94 = 87,775.70/x
  3. Step 3: Cross multiply
    159,393.12x = 219,963.94 × 87,775.70
  4. Step 4: Simplify right side
    159,393.12x = 19,307,488,808.26
  5. Step 5: Solve for x
    x = 19,307,488,808.26/159,393.12
  6. Step 6: Final answer
    x = 121,131.26

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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.