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Finding the Fourth Proportional to 115,672.97, 159,627.60 and 64,685.11

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Solution

The fourth proportional to 115,672.97, 159,627.60 and 64,685.11 is: 89,264.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,672.97 : 159,627.60 = 64,685.11 : x
  2. Step 2: Convert to fraction form
    115,672.97/159,627.60 = 64,685.11/x
  3. Step 3: Cross multiply
    115,672.97x = 159,627.60 × 64,685.11
  4. Step 4: Simplify right side
    115,672.97x = 10,325,529,440.16
  5. Step 5: Solve for x
    x = 10,325,529,440.16/115,672.97
  6. Step 6: Final answer
    x = 89,264.84

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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.