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Finding the Fourth Proportional to 158,941.79, 219,342.76 and 87,324.51

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Solution

The fourth proportional to 158,941.79, 219,342.76 and 87,324.51 is: 120,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,941.79 : 219,342.76 = 87,324.51 : x
  2. Step 2: Convert to fraction form
    158,941.79/219,342.76 = 87,324.51/x
  3. Step 3: Cross multiply
    158,941.79x = 219,342.76 × 87,324.51
  4. Step 4: Simplify right side
    158,941.79x = 19,153,999,039.05
  5. Step 5: Solve for x
    x = 19,153,999,039.05/158,941.79
  6. Step 6: Final answer
    x = 120,509.53

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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.