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Finding the Fourth Proportional to 118,889.60, 178,291.20 and 40,006.40

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Solution

The fourth proportional to 118,889.60, 178,291.20 and 40,006.40 is: 59,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,889.60 : 178,291.20 = 40,006.40 : x
  2. Step 2: Convert to fraction form
    118,889.60/178,291.20 = 40,006.40/x
  3. Step 3: Cross multiply
    118,889.60x = 178,291.20 × 40,006.40
  4. Step 4: Simplify right side
    118,889.60x = 7,132,789,063.68
  5. Step 5: Solve for x
    x = 7,132,789,063.68/118,889.60
  6. Step 6: Final answer
    x = 59,995.06

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1.5x scale

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.