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Finding the Fourth Proportional to 118,867.60, 164,036.64 and 65,154.88

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Solution

The fourth proportional to 118,867.60, 164,036.64 and 65,154.88 is: 89,913.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,867.60 : 164,036.64 = 65,154.88 : x
  2. Step 2: Convert to fraction form
    118,867.60/164,036.64 = 65,154.88/x
  3. Step 3: Cross multiply
    118,867.60x = 164,036.64 × 65,154.88
  4. Step 4: Simplify right side
    118,867.60x = 10,687,787,594.80
  5. Step 5: Solve for x
    x = 10,687,787,594.80/118,867.60
  6. Step 6: Final answer
    x = 89,913.38

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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.