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Finding the Fourth Proportional to 118,078.40, 177,139.20 and 47,964.80

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Solution

The fourth proportional to 118,078.40, 177,139.20 and 47,964.80 is: 71,955.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,078.40 : 177,139.20 = 47,964.80 : x
  2. Step 2: Convert to fraction form
    118,078.40/177,139.20 = 47,964.80/x
  3. Step 3: Cross multiply
    118,078.40x = 177,139.20 × 47,964.80
  4. Step 4: Simplify right side
    118,078.40x = 8,496,446,300.16
  5. Step 5: Solve for x
    x = 8,496,446,300.16/118,078.40
  6. Step 6: Final answer
    x = 71,955.97

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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.