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Finding the Fourth Proportional to 118,171.78, 163,047.90 and 72,219.70

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Solution

The fourth proportional to 118,171.78, 163,047.90 and 72,219.70 is: 99,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,171.78 : 163,047.90 = 72,219.70 : x
  2. Step 2: Convert to fraction form
    118,171.78/163,047.90 = 72,219.70/x
  3. Step 3: Cross multiply
    118,171.78x = 163,047.90 × 72,219.70
  4. Step 4: Simplify right side
    118,171.78x = 11,775,270,423.63
  5. Step 5: Solve for x
    x = 11,775,270,423.63/118,171.78
  6. Step 6: Final answer
    x = 99,645.37

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1.5x scale

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.