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Finding the Fourth Proportional to 159,420.59, 219,997.71 and 87,807.29

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Solution

The fourth proportional to 159,420.59, 219,997.71 and 87,807.29 is: 121,172.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,420.59 : 219,997.71 = 87,807.29 : x
  2. Step 2: Convert to fraction form
    159,420.59/219,997.71 = 87,807.29/x
  3. Step 3: Cross multiply
    159,420.59x = 219,997.71 × 87,807.29
  4. Step 4: Simplify right side
    159,420.59x = 19,317,402,721.31
  5. Step 5: Solve for x
    x = 19,317,402,721.31/159,420.59
  6. Step 6: Final answer
    x = 121,172.57

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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.