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Finding the Fourth Proportional to 115,411.71, 159,270.85 and 72,393.03

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Solution

The fourth proportional to 115,411.71, 159,270.85 and 72,393.03 is: 99,904.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,411.71 : 159,270.85 = 72,393.03 : x
  2. Step 2: Convert to fraction form
    115,411.71/159,270.85 = 72,393.03/x
  3. Step 3: Cross multiply
    115,411.71x = 159,270.85 × 72,393.03
  4. Step 4: Simplify right side
    115,411.71x = 11,530,099,512.67
  5. Step 5: Solve for x
    x = 11,530,099,512.67/115,411.71
  6. Step 6: Final answer
    x = 99,904.07

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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.