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Finding the Fourth Proportional to 118,615.80, 177,866.10 and 65,969.40

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Solution

The fourth proportional to 118,615.80, 177,866.10 and 65,969.40 is: 98,922.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,615.80 : 177,866.10 = 65,969.40 : x
  2. Step 2: Convert to fraction form
    118,615.80/177,866.10 = 65,969.40/x
  3. Step 3: Cross multiply
    118,615.80x = 177,866.10 × 65,969.40
  4. Step 4: Simplify right side
    118,615.80x = 11,733,719,897.34
  5. Step 5: Solve for x
    x = 11,733,719,897.34/118,615.80
  6. Step 6: Final answer
    x = 98,922.07

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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.