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Finding the Fourth Proportional to 115,880.16, 159,910.56 and 65,578.08

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Solution

The fourth proportional to 115,880.16, 159,910.56 and 65,578.08 is: 90,495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,880.16 : 159,910.56 = 65,578.08 : x
  2. Step 2: Convert to fraction form
    115,880.16/159,910.56 = 65,578.08/x
  3. Step 3: Cross multiply
    115,880.16x = 159,910.56 × 65,578.08
  4. Step 4: Simplify right side
    115,880.16x = 10,486,627,496.52
  5. Step 5: Solve for x
    x = 10,486,627,496.52/115,880.16
  6. Step 6: Final answer
    x = 90,495.45

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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.