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Finding the Fourth Proportional to 115,963.68, 160,025.40 and 65,662.80

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Solution

The fourth proportional to 115,963.68, 160,025.40 and 65,662.80 is: 90,612.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,963.68 : 160,025.40 = 65,662.80 : x
  2. Step 2: Convert to fraction form
    115,963.68/160,025.40 = 65,662.80/x
  3. Step 3: Cross multiply
    115,963.68x = 160,025.40 × 65,662.80
  4. Step 4: Simplify right side
    115,963.68x = 10,507,715,835.12
  5. Step 5: Solve for x
    x = 10,507,715,835.12/115,963.68
  6. Step 6: Final answer
    x = 90,612.13

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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.