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Finding the Fourth Proportional to 159,166.17, 219,649.42 and 87,551.64

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Solution

The fourth proportional to 159,166.17, 219,649.42 and 87,551.64 is: 120,821.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,166.17 : 219,649.42 = 87,551.64 : x
  2. Step 2: Convert to fraction form
    159,166.17/219,649.42 = 87,551.64/x
  3. Step 3: Cross multiply
    159,166.17x = 219,649.42 × 87,551.64
  4. Step 4: Simplify right side
    159,166.17x = 19,230,666,946.05
  5. Step 5: Solve for x
    x = 19,230,666,946.05/159,166.17
  6. Step 6: Final answer
    x = 120,821.32

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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.