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Finding the Fourth Proportional to 117,989.80, 176,984.70 and 55,781.80

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Solution

The fourth proportional to 117,989.80, 176,984.70 and 55,781.80 is: 83,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,989.80 : 176,984.70 = 55,781.80 : x
  2. Step 2: Convert to fraction form
    117,989.80/176,984.70 = 55,781.80/x
  3. Step 3: Cross multiply
    117,989.80x = 176,984.70 × 55,781.80
  4. Step 4: Simplify right side
    117,989.80x = 9,872,525,138.46
  5. Step 5: Solve for x
    x = 9,872,525,138.46/117,989.80
  6. Step 6: Final answer
    x = 83,672.70

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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.