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Finding the Fourth Proportional to 118,697.69, 177,989.43 and 39,756.71

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Solution

The fourth proportional to 118,697.69, 177,989.43 and 39,756.71 is: 59,615.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,697.69 : 177,989.43 = 39,756.71 : x
  2. Step 2: Convert to fraction form
    118,697.69/177,989.43 = 39,756.71/x
  3. Step 3: Cross multiply
    118,697.69x = 177,989.43 × 39,756.71
  4. Step 4: Simplify right side
    118,697.69x = 7,076,274,151.58
  5. Step 5: Solve for x
    x = 7,076,274,151.58/118,697.69
  6. Step 6: Final answer
    x = 59,615.94

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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.