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Finding the Fourth Proportional to 118,309.63, 177,284.88 and 86,740.71

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Solution

The fourth proportional to 118,309.63, 177,284.88 and 86,740.71 is: 129,979.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,309.63 : 177,284.88 = 86,740.71 : x
  2. Step 2: Convert to fraction form
    118,309.63/177,284.88 = 86,740.71/x
  3. Step 3: Cross multiply
    118,309.63x = 177,284.88 × 86,740.71
  4. Step 4: Simplify right side
    118,309.63x = 15,377,816,363.46
  5. Step 5: Solve for x
    x = 15,377,816,363.46/118,309.63
  6. Step 6: Final answer
    x = 129,979.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.