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Finding the Fourth Proportional to 159,381.88, 219,946.99 and 87,761.72

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Solution

The fourth proportional to 159,381.88, 219,946.99 and 87,761.72 is: 121,111.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,381.88 : 219,946.99 = 87,761.72 : x
  2. Step 2: Convert to fraction form
    159,381.88/219,946.99 = 87,761.72/x
  3. Step 3: Cross multiply
    159,381.88x = 219,946.99 × 87,761.72
  4. Step 4: Simplify right side
    159,381.88x = 19,302,926,151.22
  5. Step 5: Solve for x
    x = 19,302,926,151.22/159,381.88
  6. Step 6: Final answer
    x = 121,111.17

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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.