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Finding the Fourth Proportional to 118,845.87, 164,009.12 and 65,130.45

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Solution

The fourth proportional to 118,845.87, 164,009.12 and 65,130.45 is: 89,881.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,845.87 : 164,009.12 = 65,130.45 : x
  2. Step 2: Convert to fraction form
    118,845.87/164,009.12 = 65,130.45/x
  3. Step 3: Cross multiply
    118,845.87x = 164,009.12 × 65,130.45
  4. Step 4: Simplify right side
    118,845.87x = 10,681,987,464.05
  5. Step 5: Solve for x
    x = 10,681,987,464.05/118,845.87
  6. Step 6: Final answer
    x = 89,881.02

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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.