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Finding the Fourth Proportional to 115,661.76, 159,623.52 and 72,671.04

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Solution

The fourth proportional to 115,661.76, 159,623.52 and 72,671.04 is: 100,292.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,661.76 : 159,623.52 = 72,671.04 : x
  2. Step 2: Convert to fraction form
    115,661.76/159,623.52 = 72,671.04/x
  3. Step 3: Cross multiply
    115,661.76x = 159,623.52 × 72,671.04
  4. Step 4: Simplify right side
    115,661.76x = 11,600,007,206.86
  5. Step 5: Solve for x
    x = 11,600,007,206.86/115,661.76
  6. Step 6: Final answer
    x = 100,292.50

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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.