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Finding the Fourth Proportional to 118,795.05, 163,940.10 and 65,080.20

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Solution

The fourth proportional to 118,795.05, 163,940.10 and 65,080.20 is: 89,812.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,795.05 : 163,940.10 = 65,080.20 : x
  2. Step 2: Convert to fraction form
    118,795.05/163,940.10 = 65,080.20/x
  3. Step 3: Cross multiply
    118,795.05x = 163,940.10 × 65,080.20
  4. Step 4: Simplify right side
    118,795.05x = 10,669,254,496.02
  5. Step 5: Solve for x
    x = 10,669,254,496.02/118,795.05
  6. Step 6: Final answer
    x = 89,812.28

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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.