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Finding the Fourth Proportional to 118,783.39, 163,921.11 and 65,070.33

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Solution

The fourth proportional to 118,783.39, 163,921.11 and 65,070.33 is: 89,797.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,783.39 : 163,921.11 = 65,070.33 : x
  2. Step 2: Convert to fraction form
    118,783.39/163,921.11 = 65,070.33/x
  3. Step 3: Cross multiply
    118,783.39x = 163,921.11 × 65,070.33
  4. Step 4: Simplify right side
    118,783.39x = 10,666,400,477.65
  5. Step 5: Solve for x
    x = 10,666,400,477.65/118,783.39
  6. Step 6: Final answer
    x = 89,797.07

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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.