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Finding the Fourth Proportional to 118,704.48, 163,812.32 and 64,989.92

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Solution

The fourth proportional to 118,704.48, 163,812.32 and 64,989.92 is: 89,686.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,704.48 : 163,812.32 = 64,989.92 : x
  2. Step 2: Convert to fraction form
    118,704.48/163,812.32 = 64,989.92/x
  3. Step 3: Cross multiply
    118,704.48x = 163,812.32 × 64,989.92
  4. Step 4: Simplify right side
    118,704.48x = 10,646,149,571.81
  5. Step 5: Solve for x
    x = 10,646,149,571.81/118,704.48
  6. Step 6: Final answer
    x = 89,686.16

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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.