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Finding the Fourth Proportional to 115,880, 159,914.40 and 65,579.12

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Solution

The fourth proportional to 115,880, 159,914.40 and 65,579.12 is: 90,499.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,880 : 159,914.40 = 65,579.12 : x
  2. Step 2: Convert to fraction form
    115,880/159,914.40 = 65,579.12/x
  3. Step 3: Cross multiply
    115,880x = 159,914.40 × 65,579.12
  4. Step 4: Simplify right side
    115,880x = 10,487,045,627.33
  5. Step 5: Solve for x
    x = 10,487,045,627.33/115,880
  6. Step 6: Final answer
    x = 90,499.19

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1.5x scale

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.