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Finding the Fourth Proportional to 115,963.60, 160,029.12 and 65,662.60

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Solution

The fourth proportional to 115,963.60, 160,029.12 and 65,662.60 is: 90,614.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,963.60 : 160,029.12 = 65,662.60 : x
  2. Step 2: Convert to fraction form
    115,963.60/160,029.12 = 65,662.60/x
  3. Step 3: Cross multiply
    115,963.60x = 160,029.12 × 65,662.60
  4. Step 4: Simplify right side
    115,963.60x = 10,507,928,094.91
  5. Step 5: Solve for x
    x = 10,507,928,094.91/115,963.60
  6. Step 6: Final answer
    x = 90,614.02

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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.